/* ============================================================
   默维广告 · 官网设计系统
   深黑/浅灰交替板块、大字标题、胶囊按钮、五色业务卡片
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  /* 品牌主色：默维品牌蓝 #0044FF（取自 LOGO 源文件） */
  --brand: #0044ff;
  --brand-deep: #0033cc;
  --brand-ink: #ffffff;
  --brand-tint: rgba(0, 68, 255, 0.1);

  --ink: #171918;        /* 近黑（主文字/深色板块） */
  --ink-2: #4b5054;      /* 次级文字 */
  --ink-3: #8a9094;      /* 辅助文字 */
  --line: rgba(23, 25, 24, 0.14);
  --line-dark: rgba(255, 255, 255, 0.14);

  --dark: #0b0c0e;       /* 深色板块底 */
  --dark-2: #16181c;     /* 深色卡片 */
  --dark-3: #23262b;     /* 深色卡片（亮一档） */

  --light: #f5f5f7;      /* 浅色板块底 */
  --white: #ffffff;

  /* 业务卡片四色 + 近黑 */
  --c-blue: #254dcc;
  --c-green: #147258;
  --c-red: #b93242;
  --c-purple: #60308f;

  --radius: 20px;
  --radius-lg: 28px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Segoe UI", system-ui, -apple-system, sans-serif;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --header-h: 76px;
  /* 内页头图统一高度（产品中心/项目案例/关于默维三页共用，1440 宽≈457px） */
  --page-hero-h: clamp(320px, 31.75vw, 458px);
}

/* ---------- 基础重置 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--ink);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  animation: pageIn 0.5s var(--ease) both;
}
@keyframes pageIn { from { opacity: 0; } to { opacity: 1; } }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }
::selection { background: var(--brand); color: #fff; }

/* 页面加载淡入 */
main { animation: pageIn 0.6s var(--ease) both; }

/* ---------- 通用容器与排版 ---------- */
.container {
  width: min(1280px, calc(100% - 96px));
  margin-inline: auto;
}

.sec-title {
  font-size: clamp(30px, 3.6vw, 52px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: 0.01em;
  margin: 0 0 16px;
}
.sec--dark .sec-title { color: #fff; }
.sec-sub {
  font-size: clamp(15px, 1.3vw, 18px);
  color: var(--ink-2);
  max-width: 640px;
}
.sec--dark .sec-sub { color: rgba(255, 255, 255, 0.62); }

/* 板块底部备注 */
.sec-note {
  margin-top: 40px;
  text-align: center;
  font-size: 14.5px;
  color: var(--ink-2);
}
.sec-note--dark { color: rgba(255, 255, 255, 0.6); }

/* ---------- 板块节奏 ---------- */
.sec { padding: 110px 0; }
.sec--light { background: var(--light); }
.sec--white { background: var(--white); }
.sec--dark { background: var(--dark); }
.sec.sec--stats { padding: clamp(30px, 2.7vw, 38px) 0; border-top: 1px solid rgba(255, 255, 255, 0.07); }
.sec-head { margin-bottom: 56px; }
.sec-head .sec-sub { margin-top: 0; }
/* 板块头：标题在左、备注段落右置（如「精选案例」） */
.sec-head--split {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 56px;
}
.sec-head--split .sec-head__titles { flex: 0 0 auto; }
.sec-note--head {
  margin: 0;
  flex: 0 1 600px;
  text-align: right;
  line-height: 1.85;
}
@media (max-width: 860px) {
  .sec-head--split { flex-direction: column; align-items: flex-start; gap: 16px; }
  .sec-note--head { flex: none; text-align: left; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 52px;
  padding: 0 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
    background 0.25s, color 0.25s, border-color 0.25s;
  white-space: nowrap;
}
.btn--brand { background: var(--brand); color: var(--brand-ink); }
.btn--brand:hover {
  background: var(--brand-deep);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 68, 255, 0.32);
}
.btn--dark { background: var(--ink); color: #fff; }
.btn--dark:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(23, 25, 24, 0.28); }
.btn--ghost { border: 1px solid var(--line); color: var(--ink); background: transparent; }
.btn--ghost:hover { border-color: var(--ink); transform: translateY(-2px); }
.sec--dark .btn--ghost, .btn--ghost-light { border: 1px solid var(--line-dark); color: #fff; }
.sec--dark .btn--ghost:hover, .btn--ghost-light:hover { border-color: #fff; }
.btn--sm { height: 44px; padding: 0 22px; font-size: 14px; }
.btn > svg { width: 17px; height: 17px; flex: none; }

/* ---------- 获客按钮组：主操作「获取报价」+ 次操作「电话咨询」 ---------- */
.btn-group {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

/* ---------- 弹层基座：定位 / 动画 / 小三角 ---------- */
.phone-wrap { position: relative; }
.phone-pop {
  position: absolute;
  z-index: 95;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease), visibility 0.35s;
}
.phone-pop--left {
  right: calc(100% + 14px);
  top: 50%;
  transform: translateY(-50%) translateX(12px);
}
.phone-pop--top {
  bottom: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
}
.float-btn-wrap:hover .phone-pop--left,
.phone-pop--left.open { opacity: 1; visibility: visible; pointer-events: auto; transform: translateY(-50%) translateX(0); }
.phone-pop--top.open { opacity: 1; visibility: visible; pointer-events: auto; transform: translateX(-50%) translateY(0); }
.phone-pop::after {
  content: "";
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 2px;
}
.phone-pop--left::after { right: -5px; top: 50%; transform: translateY(-50%) rotate(45deg); }
.phone-pop--top::after { bottom: -5px; left: 50%; transform: translateX(-50%) rotate(45deg); }

/* ---------- 内联「电话咨询」：浅色紧凑卡（号码 + 立即拨打） ---------- */
.phone-pop--num {
  min-width: 216px;
  padding: 16px 20px 14px;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 18px 44px rgba(23, 25, 24, 0.22);
  text-align: left;
}
.phone-pop--num::after { background: #fff; }
.phone-pop__label { display: block; font-size: 12px; font-weight: 600; letter-spacing: 0.1em; color: var(--ink-2); margin-bottom: 6px; }
.phone-pop__num {
  display: block;
  font-family: "Bahnschrift", "DIN Alternate", "Arial Narrow", "Segoe UI", sans-serif;
  font-size: 25px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--ink);
  font-stretch: condensed;
}
.phone-pop__num:hover { color: var(--brand); }
.phone-pop__call {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  font-size: 13px;
  font-weight: 700;
  color: var(--brand);
}
.phone-pop__call:hover { color: var(--brand-deep); }
.phone-pop__call svg { width: 14px; height: 14px; }

/* ---------- 悬浮「电话咨询」：深色完整卡（对齐参考设计稿）
   本轮：去掉文字标题（HTML），弹窗整体缩小（宽 224→158、内边距收紧），
   二维码随内容宽 ×0.7（182→128px，即缩小 0.3 倍） ---------- */
.phone-pop--consult {
  width: 158px;
  padding: 16px 14px 14px;
  background: var(--dark-2);
  border: 1px solid var(--line-dark);
  border-radius: 14px;
  box-shadow: 0 24px 56px rgba(23, 25, 24, 0.38);
  text-align: center;
}
.phone-pop--consult::after { background: var(--dark-2); }
.phone-pop__title { display: block; font-size: 15px; font-weight: 700; letter-spacing: 0.02em; color: #fff; }
.phone-pop__qr { width: 100%; display: block; margin: 0; border-radius: 10px; }
.phone-pop--consult .phone-pop__label { margin-top: 16px; color: rgba(255, 255, 255, 0.55); }
.phone-pop--consult .phone-pop__num { color: #fff; }
.phone-pop--consult .phone-pop__num:hover { color: #5b8aff; }
.phone-pop__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  height: 44px;
  margin-top: 16px;
  background: var(--brand);
  color: #fff;
  border: 0;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 700;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s, background 0.25s;
}
.phone-pop__cta:hover { background: var(--brand-deep); transform: translateY(-2px); box-shadow: 0 12px 26px rgba(0, 68, 255, 0.32); }
.phone-pop__cta svg { width: 18px; height: 18px; }

/* ---------- 移动端：弹层改为屏幕居中，避免越界 ---------- */
@media (max-width: 640px) {
  .phone-pop--left, .phone-pop--top {
    position: fixed;
    left: 50%;
    top: 50%;
    right: auto;
    bottom: auto;
    transform: translate(-50%, -50%) scale(0.96);
    z-index: 200;
  }
  .phone-pop--left.open, .phone-pop--top.open { transform: translate(-50%, -50%) scale(1); }
  .phone-pop::after { display: none; }
}

/* 文字链（带斜箭头） */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  transition: color 0.25s;
}
.sec--dark .link-arrow, .link-arrow--light { color: #fff; }

/* ---------- 顶部导航（常驻深色） ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  display: flex;
  align-items: center;
  z-index: 100;
  background: rgba(11, 12, 14, 0.94);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-dark);
  transition: box-shadow 0.35s, background 0.35s;
}
.site-header .container {
  width: min(1500px, calc(100% - 96px));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.site-header.scrolled {
  background: rgba(11, 12, 14, 0.99);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
}
.logo { display: flex; align-items: center; }
.logo-img { height: 34px; width: auto; display: block; }
.logo-tagline {
  margin-left: 16px;
  padding-left: 16px;
  border-left: 1px solid rgba(255, 255, 255, 0.24);
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.main-nav { display: flex; flex: 1; align-items: center; justify-content: space-evenly; gap: 0; margin: 0 20px; }
.main-nav a {
  position: relative;
  padding: 9px 14px;
  font-size: 13.5px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.75);
  border-radius: 999px;
  transition: color 0.25s, background 0.25s;
}
.main-nav a:hover { color: #fff; }
/* 悬停：蓝线自顶部下滑至底部，自中心向两侧展开（与激活下划线同位置） */
.main-nav a::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--brand);
  transition: width 0.35s var(--ease), top 0.35s var(--ease);
}
.main-nav a:hover::before {
  top: calc(100% - 5px);
  width: calc(100% - 28px);
}
.main-nav a.active { color: var(--brand); font-weight: 700; }
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--brand);
}
.header-actions { display: flex; align-items: center; gap: 18px; }
.header-phone {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
}
.header-phone svg { color: var(--brand); }

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--line-dark);
  background: transparent;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: #fff;
  margin-inline: auto;
  transition: transform 0.3s var(--ease), opacity 0.3s;
}
body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 首屏 Hero ---------- */
/* ---------- 首屏全屏轮播 ---------- */
.banner {
  position: relative;
  margin-top: var(--header-h);
  height: calc(100vh - var(--header-h));
  min-height: 600px;
  overflow: hidden;
  background: var(--dark);
  /* 鼠标/触摸拖动切换：抓取光标 + 纵向仍可滚动页面 */
  cursor: grab;
  touch-action: pan-y;
  user-select: none;
  -webkit-user-select: none;
}
.banner.is-dragging { cursor: grabbing; }
.banner-slides { position: absolute; inset: 0; }
.banner-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 1s var(--ease), visibility 1s;
}
.banner-slide.is-active { opacity: 1; visibility: visible; }
.banner-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transform: scale(1.12);
  transition: transform 5s linear;
}
.banner-slide.is-active .banner-bg { transform: scale(1); }
.banner-mask {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(8, 9, 12, 0.74) 0%, rgba(8, 9, 12, 0.6) 42%, rgba(8, 9, 12, 0.84) 100%),
    radial-gradient(ellipse at center, rgba(8, 9, 12, 0.5) 0%, rgba(8, 9, 12, 0.78) 100%);
}
.banner-inner {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  /* 标题在上半部；卖点行由 margin:auto 垂直居中于标题与按钮之间；
     底部 padding 预留按钮区（bottom:15% + 按钮高 + 间隙），使居中不与按钮重叠 */
  padding: clamp(56px, 13vh, 140px) 40px calc(15vh + 48px);
}
/* 逐行渐显：标题两行依次浮现，卖点行、按钮组随后 */
.banner-line { display: block; text-wrap: balance; }
.banner-slide.is-active .banner-line,
.banner-slide.is-active .banner-feats,
.banner-slide.is-active .banner-inner > .btn-group {
  animation: bannerLineIn 0.75s var(--ease) both;
}
.banner-slide.is-active .banner-line:nth-child(1) { animation-delay: 0.12s; }
.banner-slide.is-active .banner-line:nth-child(2) { animation-delay: 0.34s; }
.banner-slide.is-active .banner-feats { animation-delay: 0.52s; }
.banner-slide.is-active .banner-inner > .btn-group { animation-delay: 0.72s; }
@keyframes bannerLineIn {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: none; }
}
.banner-title {
  position: relative;
  /* 三屏大标题统一 85px（用户指定）；用 clamp 在窄屏平滑缩小避免溢出，宽屏封顶 85px；
     左右仍各留 84px 呼吸空间；单行不折、不溢出 */
  font-size: clamp(22px, min(6vw, calc((100vw - 168px) / 14.9)), 85px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: #fff;
  margin: 0 auto;
  max-width: calc(100vw - 168px);
  text-shadow: 0 2px 30px rgba(0, 0, 0, 0.45);
  text-align: center;
}
.banner-title em { font-style: normal; color: inherit; }
/* 按钮：本轮整体下移到头图下部（距底 15%，仍高于底部线型标签），三屏统一对齐；
   水平居中由 left/right:0 + 父级 text-align 实现，不与入场动画的 transform 冲突 */
.banner-inner > .btn-group {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 15%;
  margin: 0;
  justify-content: center;
}

/* Banner 卖点图标行（仅首屏 Banner：标题与按钮之间）
   本轮：① 位置下移——margin 上下 auto 使其垂直居中于标题与按钮之间；
   ② 整体放大 0.5 倍（×1.5：字号/图标/间距同比例） */
.banner-feats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 13.5px clamp(22.5px, 3.375vw, 48px);
  /* 上下 auto 均分标题→按钮之间的剩余空间，实现「居中间」 */
  margin: auto 0;
}
.banner-feat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7.5px;
  color: #fff;
  /* 副标题层级：明显小于主标题，随视口缩放且设上限 */
  font-size: clamp(9px, 1.425vw, 14.25px);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.4);
}
.banner-feat svg { width: 38.25px; height: 38.25px; }
/* 首屏按钮整体缩小一半（原 font 22.5px / height 70px / padding 0 42px） */
.banner-inner .btn { font-size: 11.25px; height: 35px; padding: 0 21px; gap: 6.5px; }
.banner-inner .btn > svg { width: 12px; height: 12px; }
@media (max-width: 640px) {
  /* 窄屏同比例放大（×1.5），margin auto 居中沿用基础规则 */
  .banner-feats { gap: 12px 24px; }
  .banner-feat { font-size: 12px; gap: 6px; }
  .banner-feat svg { width: 24px; height: 24px; }
  .banner-inner .btn { font-size: 11px; height: 30px; padding: 0 18px; gap: 5px; }
  .banner-inner .btn > svg { width: 10px; height: 10px; }
}

/* 底部线型切换标签（与参考设计一致）：短横排一排，当前项加长提亮，
   内部白色进度随 5s 自动轮播同步走满 */
.banner-tabs {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 30px;
  z-index: 6;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
}
.banner-tab {
  position: relative;
  width: 26px;
  height: 3px;
  padding: 0;
  border: none;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.28);
  cursor: pointer;
  overflow: hidden;
  transition: width 0.4s var(--ease), background-color 0.3s var(--ease);
}
.banner-tab:hover { background: rgba(255, 255, 255, 0.5); }
.banner-tab i {
  position: absolute;
  inset: 0;
  background: #fff;
  transform: scaleX(0);
  transform-origin: left center;
}
.banner-tab.is-active { width: 46px; }
.banner-tab.is-active i {
  animation: bannerTabFill var(--banner-interval, 5000ms) linear forwards;
}
@keyframes bannerTabFill {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* 页面头（内页） */
.page-hero {
  margin-top: var(--header-h);
  padding: clamp(72px, 8vw, 128px) 0 clamp(56px, 6vw, 96px);
  background: var(--white);
  border-bottom: 1px solid var(--line);
}
.page-hero .sec-title { margin-bottom: 12px; }

/* 页面头：背景图修饰（产品中心 / 项目案例）
   背景图占满整块、cover 等比铺满不变形不平铺；压暗渐变保证文字可读；
   文字改白并加阴影，深色模式同样保持白字（本类无 dark 覆写依赖） */
.page-hero--img {
  position: relative;
  border-bottom: none;
  color: #fff;
  /* 三页头图统一高度 + 文字垂直居中（与项目案例完全一致） */
  height: var(--page-hero-h);
  padding: 0;
  display: flex;
  align-items: center;
}
.page-hero--img::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(8,10,12,.82) 0%, rgba(8,10,12,.55) 42%, rgba(8,10,12,.14) 78%, rgba(8,10,12,.06) 100%);
}
.page-hero--img .container { position: relative; z-index: 1; }
/* 头图内文字块垂直居中：清掉 sec-head 的下方 56px 间距，避免居中偏上 */
.page-hero--img .sec-head { margin-bottom: 0; }
.page-hero--img .sec-title,
.page-hero--img .sec-sub { color: #fff; text-shadow: 0 2px 24px rgba(0,0,0,.4); }
.page-hero--svc { background: url("../img/svc-hero.jpg?v=20261020b") center / cover no-repeat; }
.page-hero--cases { background: url("../img/cases-hero.jpg?v=20261020b") center / cover no-repeat; }
.page-hero--news { background: url("../img/news-hero.jpg?v=20261020a") center / cover no-repeat; }

/* ---------- 关于页：公司简介（头图背景图，左侧文字压图） ---------- */
.about-intro {
  position: relative;
  margin-top: var(--header-h);
  overflow: hidden;
  background: var(--dark);
  /* 高度与产品中心/项目案例页头图完全一致（--page-hero-h），文案垂直居中；
     图片加载前由 var(--dark) 底色兜底，不影响布局 */
  display: flex;
  align-items: center;
  height: var(--page-hero-h);
  padding: 0;
}
.about-intro__media {
  position: absolute;
  inset: 0;
  /* cover：等比缩放铺满容器，不变形、不留白、不平铺重复 */
  background: url("../img/about-hero2.jpg?v=20261020a") center / cover no-repeat;
}
/* 满铺地图上的文字可读性：左深右浅的横向渐变压暗 */
.about-intro__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(8, 10, 12, 0.82) 0%, rgba(8, 10, 12, 0.55) 42%, rgba(8, 10, 12, 0.14) 78%, rgba(8, 10, 12, 0.06) 100%);
}
.about-intro__copy {
  position: relative;
  z-index: 1;
  max-width: 560px;
}
.about-intro__copy .hero-eyebrow { color: #7da2ff; }
.about-intro__copy .hero-eyebrow i { color: rgba(255, 255, 255, 0.5); }
.about-intro__title {
  margin: 0 0 12px;
  /* 与项目案例 sec-title 同款排版：字号/行高/字距完全统一 */
  font-size: clamp(30px, 3.6vw, 52px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: 0.01em;
  color: #fff;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.4);
}
.about-intro__desc {
  /* 与项目案例 sec-sub 同款排版 */
  margin: 0;
  max-width: 640px;
  font-size: clamp(15px, 1.3vw, 18px);
  color: #fff;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.4);
}
@media (max-width: 900px) {
  .about-intro__copy { max-width: 100%; }
  .about-intro__desc { max-width: 100%; }
  /* 移动端保持满铺地图 + 文字压图，渐变改上下压暗保证可读性 */
  .about-intro__media::after {
    background: linear-gradient(180deg, rgba(8, 10, 12, 0.74) 0%, rgba(8, 10, 12, 0.5) 100%);
  }
}

/* ---------- 数据信任区（无卡片，四列直排深色底，列间淡竖线） ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat {
  position: relative;
  padding: 0 clamp(18px, 2.3vw, 32px);
  border: 0;
  border-radius: 0;
  background: none;
}
.stat:first-child { padding-left: 0; }
.stat:last-child { padding-right: 0; }
.stat + .stat { border-left: 1px solid rgba(255, 255, 255, 0.09); }
.stat-num {
  font-family: "Bahnschrift", "DIN Alternate", "Arial Narrow", "Segoe UI", sans-serif;
  font-size: clamp(52px, 5vw, 76px);
  font-weight: 500;
  line-height: 0.95;
  color: #fff;
  letter-spacing: 0.01em;
  font-stretch: condensed;
  position: relative;
  display: inline-block;
}
.stat-num i { font-style: normal; color: var(--brand); font-weight: 500; }
.stat-num i.plus {
  position: absolute;
  top: -0.12em;
  right: -0.28em;
  margin: 0;
  font-size: 0.28em;
  font-weight: 300;
  line-height: 1;
}
.stat-num i.unit { font-size: 0.36em; margin-left: 3px; }
.stat-line { display: block; width: 26px; height: 2px; background: rgba(255, 255, 255, 0.28); margin: 12px 0 10px; }
.stat-name { margin-top: 0; font-size: 15px; font-weight: 700; color: #fff; letter-spacing: 0.01em; }

/* ---------- WHY 默维（无边框，蓝色短线上标注） ---------- */
.hl-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
  margin-top: 76px;
}
.hl-item {
  position: relative;
  padding: 24px 0 0;
}
.hl-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 28px;
  height: 3px;
  border-radius: 2px;
  background: var(--brand);
}
.hl-item h4 { font-size: 17px; font-weight: 800; color: #fff; margin: 0 0 10px; }
.hl-item p { font-size: 13.5px; color: rgba(255, 255, 255, 0.58); line-height: 1.85; }
.hl-sep { height: 1px; background: var(--line-dark); margin: 76px 0 0; }

/* ---------- 业务卡片（白底线框，悬停灰底动效） ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.cap-card, .cap-card.reveal {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-width: 0;
  min-height: 340px;
  padding: 38px 20px 32px;
  background: #fff;
  border: 1px solid #e6e7ea;
  border-radius: var(--radius-lg);
  color: #33363c;
  text-decoration: none;
  transition:
    background-color 0.3s var(--ease),
    border-color 0.3s var(--ease),
    color 0.3s var(--ease),
    transform 0.45s var(--ease),
    box-shadow 0.3s var(--ease);
}
.cap-card.reveal:hover, .cap-card:hover {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(0, 68, 255, 0.28);
}
.cap-icon {
  display: inline-flex;
  width: 52px;
  height: 52px;
  margin-bottom: 20px;
  color: #2b2e34;
  transition: color 0.3s var(--ease), transform 0.45s var(--ease);
}
.cap-icon svg { width: 100%; height: 100%; }
.cap-card:hover .cap-icon { color: rgba(255, 255, 255, 0.9); transform: translateY(-3px) scale(1.04); }
.cap-card h3 { font-size: 20px; font-weight: 800; color: inherit; margin: 0 0 14px; transition: color 0.3s var(--ease); }
.cap-card:hover h3 { color: #fff; }
.cap-line {
  display: block;
  width: 22px;
  height: 2px;
  margin-bottom: 16px;
  background: #d6d8dc;
  transition: width 0.45s var(--ease), background-color 0.3s var(--ease);
}
.cap-card:hover .cap-line { width: 34px; background: rgba(255, 255, 255, 0.85); }
.cap-tags {
  font-size: 11.5px;
  letter-spacing: 0.01em;
  white-space: normal;
  overflow-wrap: break-word;
  color: #6d727a;
  margin: 0 0 14px;
  transition: color 0.3s var(--ease);
}
.cap-card:hover .cap-tags { color: rgba(255, 255, 255, 0.85); }
.cap-desc { font-size: 13px; line-height: 1.85; color: #9aa0a6; margin: 0; transition: color 0.3s var(--ease); }
.cap-card:hover .cap-desc { color: #fff; }

/* ---------- 案例卡片（横版图片卡，仅保留 3 个关键标签） ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
  position: relative;
  display: block;
  border-radius: 0;
  overflow: hidden;
  background: #0b0c0e;
}
/* 默认：只显示案例图片，标签与文字全部隐藏 */
.case-art {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #0b0c0e;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 14px;
}
.case-art img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.4s var(--ease), transform 0.6s var(--ease);
}
/* 悬停：图片消失（黑底），文字居中、全白、按比例放大浮现 */
.case-card:hover .case-art img { opacity: 0; }
.case-title {
  position: absolute;
  z-index: 2;
  max-width: 82%;
  color: #fff;
  font-size: 24px;
  line-height: 1.35;
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease);
}
.case-tag {
  position: absolute;
  z-index: 2;
  padding: 0;
  background: none;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.12em;
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease);
}
/* 悬停文字：项目类型 / 核心尺寸 / 交付周期 */
.case-keys {
  position: absolute;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 11px;
  padding: 0;
  background: none;
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease);
}
.case-card:hover .case-title,
.case-card:hover .case-tag,
.case-card:hover .case-keys { position: static; opacity: 1; transform: scale(1); }
.case-keys span {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 8px;
  font-size: 14.5px;
  line-height: 1.5;
  color: #fff;
}
.case-keys i { font-style: normal; font-size: 12.5px; color: rgba(255, 255, 255, 0.72); }
.case-keys i::after { content: "："; }

.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.news-card { display: flex; min-height: 220px; flex-direction: column; justify-content: flex-end; padding: 30px; border: 1px solid var(--line); background: var(--white); color: var(--ink); transition: transform .25s var(--ease), border-color .25s var(--ease); }
.news-card:hover { transform: translateY(-4px); border-color: var(--brand); }
.news-card span { color: var(--brand); font-size: 13px; font-weight: 700; letter-spacing: .08em; }
.news-card h2 { margin: 14px 0 10px; font-size: 21px; line-height: 1.35; }
.news-card p { margin: 0; color: var(--ink-3); font-size: 14px; line-height: 1.8; }
.news-grid--dark .news-card { background: rgba(255,255,255,.04); border-color: var(--line-dark); color: #fff; }
.news-grid--dark .news-card p { color: rgba(255,255,255,.6); }
.news-more { margin-top: 36px; }

/* ---------- 新闻资讯：沿用官网案例页的图片与深浅版块节奏 ---------- */
.eyebrow { margin: 0 0 12px; color: var(--brand); font-size: 12px; font-weight: 800; letter-spacing: .14em; }
.page-hero--img .eyebrow { color: #71a4ff; }
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.article-card { display: block; overflow: hidden; border: 1px solid var(--line-dark); background: rgba(255,255,255,.035); color: #fff; transition: transform .3s var(--ease), border-color .3s var(--ease), background .3s var(--ease); }
.article-card:hover { transform: translateY(-5px); border-color: rgba(255,255,255,.68); background: rgba(255,255,255,.07); }
.article-card__image { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: #15171b; }
.article-card__image::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 35%, rgba(0,0,0,.28)); }
.article-card__image img { width: 100%; height: 100%; object-fit: cover; transition: transform .55s var(--ease); }
.article-card:hover .article-card__image img { transform: scale(1.06); }
.article-card__body { padding: 23px 24px 25px; }
.article-card__body span { display: block; color: #6fa1ff; font-size: 12px; font-weight: 800; letter-spacing: .1em; }
.article-card__body h2 { margin: 10px 0 9px; color: inherit; font-size: 22px; line-height: 1.35; }
.article-card__body p { min-height: 48px; margin: 0; color: rgba(255,255,255,.62); font-size: 14px; line-height: 1.75; }
.article-card__body b { display: inline-block; margin-top: 18px; color: #fff; font-size: 13px; font-weight: 700; }
.article-card--light { border-color: var(--line); background: var(--white); color: var(--ink); }
.article-card--light:hover { border-color: var(--ink); background: var(--white); }
.article-card--light .article-card__body span { color: var(--brand); }
.article-card--light .article-card__body p { color: var(--ink-3); }
.article-card--light .article-card__body b { color: var(--ink); }
.article-grid--three { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 560px) {
  .case-grid--featured .case-card:nth-child(n + 4) { display: none; }
  .case-grid .case-art { align-items: flex-start; justify-content: flex-end; text-align: left; }
  .case-grid .case-art::after { content: ""; position: absolute; inset: 34% 0 0; z-index: 1; background: linear-gradient(transparent, rgba(8, 9, 12, 0.88)); }
  .case-grid .case-art img { opacity: 1; }
  .case-grid .case-title { position: static; z-index: 2; max-width: none; padding: 0 18px 3px; opacity: 1; transform: none; font-size: 18px; font-weight: 700; }
  .case-grid .case-tag { display: none; }
  .case-grid .case-keys { position: static; z-index: 2; display: block; padding: 0 18px 18px; opacity: 1; transform: none; }
  .case-grid .case-keys span { display: none; }
  .case-grid .case-keys span:first-child { display: block; font-size: 15px; font-weight: 600; }
  .case-grid .case-keys span:first-child i { display: none; }
  .article-grid, .article-grid--three { grid-template-columns: 1fr; gap: 16px; }
  .article-card__body { padding: 19px 18px 20px; }
  .article-card__body h2 { font-size: 20px; }
  .article-card__body p { min-height: 0; }
}

/* ---------- 筛选栏（案例页） ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 44px; }
.filter-btn {
  height: 44px;
  padding: 0 24px;
  border-radius: 999px;
  border: 1px solid var(--line-dark);
  color: rgba(255, 255, 255, 0.72);
  font-size: 14.5px;
  font-weight: 600;
  transition: all 0.25s;
}
.filter-btn:hover { border-color: #fff; color: #fff; }
.filter-btn.active { background: var(--brand); border-color: var(--brand); color: #fff; }
.case-grid .case-card.hide { display: none; }
.case-empty { margin: 28px 0 0; color: rgba(255,255,255,.7); font-size: 15px; }

/* ---------- 服务流程 ---------- */
.process { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; counter-reset: step; }
.process-step {
  position: relative;
  padding: 32px 26px;
  border-radius: var(--radius-lg);
  background: var(--white);
  border: 1px solid var(--line);
}
.sec--dark .process-step { background: var(--dark-2); border-color: var(--line-dark); }
.process-step .no {
  font-size: 15px;
  font-weight: 800;
  color: var(--brand);
  letter-spacing: 0.08em;
}
.process-step h4 { font-size: 19px; font-weight: 800; margin: 12px 0 8px; }
.sec--dark .process-step h4 { color: #fff; }
.process-step p { font-size: 13.5px; color: var(--ink-2); line-height: 1.7; }
.sec--dark .process-step p { color: rgba(255, 255, 255, 0.58); }
.process-step:last-child::after { display: none; }
/* 项目流程：从左到右依次渐现（横向滑入 + 阶梯延迟由 JS 按序设置） */
.process-step.reveal { transform: translateX(-26px); }
.process-step.reveal.in { transform: none; }

/* ---------- 首页流程：白底、无卡片、五列等宽（作用域 .sec--process，不影响产品中心深色版） ---------- */
.sec.sec--process { background: var(--white); padding: clamp(50px, 4.2vw, 60px) 0; }
.sec--process .sec-head { margin-bottom: 34px; }
.sec--process .process {
  /* 横向节奏较原 20px 放缓一倍，靠间距而非卡片区隔步骤 */
  gap: 0 clamp(22px, 2.9vw, 40px);
}
.sec--process .process-step {
  padding: 0;
  background: none;
  border: 0;
  border-radius: 0;
}
.sec--process .process-step .no {
  display: block;
  font-size: 12.5px;
  font-weight: 800;
  color: var(--brand);
  letter-spacing: 0.12em;
}
.sec--process .process-step h4 {
  font-size: 19px;
  font-weight: 800;
  color: var(--ink);
  margin: 8px 0 6px;
  line-height: 1.35;
}
.sec--process .process-step p {
  font-size: 13.5px;
  color: var(--ink-3);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
}

/* 窄屏：改为纵向细线排列，五步全部展开 */
@media (max-width: 1080px) {
  .sec--process .process {
    grid-template-columns: 1fr;
    gap: 0;
    position: relative;
    padding-left: 22px;
  }
  .sec--process .process::before {
    content: "";
    position: absolute;
    left: 3px;
    top: 9px;
    bottom: 13px;
    width: 1px;
    background: var(--line);
  }
  .sec--process .process-step { padding: 0 0 26px; }
  .sec--process .process-step:last-child { padding-bottom: 0; }
  .sec--process .process-step p {
    display: block;
    overflow: visible;
    max-width: 40em;
  }
}

/* ---------- 服务详情（产品中心交替图文） ---------- */
.service-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
  padding: 72px 0;
  border-bottom: 1px solid var(--line);
}
.service-block:last-child { border-bottom: none; }
.service-block:nth-child(even) .service-copy { order: -1; }
.service-art { border-radius: var(--radius-lg); overflow: hidden; aspect-ratio: 4 / 3; background: linear-gradient(135deg, #23262b, #3a3f47); }
.service-art img { width: 100%; height: 100%; object-fit: cover; display: block; }
.service-copy h3 { font-size: clamp(26px, 2.6vw, 36px); font-weight: 800; line-height: 1.25; margin: 0 0 12px; }
.service-copy .svc-lead { font-size: 16px; font-weight: 600; color: var(--ink-2); margin: 0 0 16px; }
.service-copy > p:not(.svc-lead) { color: var(--ink-2); margin-bottom: 24px; }
.service-items { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 24px; margin-bottom: 28px; }
.service-items li {
  display: flex;
  align-items: center;
  font-size: 14.5px;
  font-weight: 500;
}

/* 页面头收紧变体（产品中心：标题与首项内容仅隔 48–72px） */
.page-hero--tight { padding-bottom: 36px; }
.sec.sec--svc { padding-top: 8px; }
.sec--svc .service-block:first-child { padding-top: 20px; }

/* ---------- 价值观卡片 ---------- */
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.value-grid--four { grid-template-columns: repeat(4, 1fr); }
.value-card {
  padding: 40px 34px;
  border-radius: var(--radius-lg);
  background: var(--white);
  border: 1px solid var(--line);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.value-card:hover { transform: translateY(-6px); box-shadow: 0 20px 40px rgba(23, 25, 24, 0.1); }
.value-card .icon {
  width: 52px;
  height: 52px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  background: var(--brand-tint);
  color: var(--brand);
  font-size: 22px;
  margin-bottom: 20px;
}
.value-card h3 { font-size: 21px; font-weight: 800; margin-bottom: 10px; }
.value-card p { font-size: 14.5px; color: var(--ink-2); }

/* ---------- 品牌宣言（大字 + 配图） ---------- */
.sec--manifesto { padding: clamp(56px, 5.2vw, 72px) 0; }
.manifesto {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.manifesto-art { border-radius: var(--radius-lg); overflow: hidden; aspect-ratio: 16 / 10; background: linear-gradient(135deg, #2b2f36, #4b5058); }
.manifesto-art img { width: 100%; height: 100%; object-fit: cover; }
.manifesto .big {
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 800;
  line-height: 1.4;
  color: #fff;
}
.manifesto .big em { font-style: normal; color: var(--brand); }
.manifesto p.desc { color: rgba(255, 255, 255, 0.62); margin-top: 20px; }
.manifesto .big { margin: 0; }

/* ---------- 关于页：品牌结语 ---------- */
.about-closing { text-align: center; }
.closing { max-width: 880px; margin: 0 auto; }
.closing__lead {
  font-size: clamp(17px, 1.8vw, 21px);
  font-weight: 600;
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.78);
  margin: 0 0 28px;
}
.closing__main {
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 800;
  line-height: 1.52;
  color: #fff;
  margin: 0 0 34px;
}
.closing__main em { font-style: normal; color: var(--brand); }
.closing__sign {
  display: inline-block;
  padding-top: 26px;
  border-top: 1px solid var(--line-dark);
  font-size: 14.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.5);
  margin: 0;
}

/* ---------- CTA 转化带 ---------- */
.cta-band {
  padding: 96px 0;
  background: var(--brand);
  color: #fff;
  text-align: center;
}
.cta-band h2 { font-size: clamp(22px, 2.6vw, 36px); font-weight: 800; line-height: 1.3; }
.cta-band p { margin: 16px auto 36px; opacity: 0.9; max-width: 560px; }
.cta-band .cta-address { margin: 26px auto 0; font-size: 15px; opacity: 0.82; max-width: 560px; }
.cta-band .btn--dark { background: var(--ink); }
.cta-band .btn--dark:hover { box-shadow: 0 14px 32px rgba(0, 0, 0, 0.3); }

/* 服务页 CTA：收紧版（高度减约 1/3，去掉上方多余白色空档） */
.sec--pre-cta { padding-bottom: 56px; }
.cta-band--tight { padding: clamp(36px, 3.4vw, 46px) 0; }
.cta-band--tight p { margin: 12px auto 22px; max-width: 700px; }
.cta-band--tight .cta-tags { margin: 14px auto 0; font-size: 13px; letter-spacing: 0.02em; opacity: 0.75; max-width: none; }

/* ---------- 我们如何做好每一个项目（白底三列） ---------- */
.sec--approach { padding: clamp(56px, 5.2vw, 74px) 0; background: var(--white); }
.sec--approach .sec-head { margin-bottom: 38px; }
.sec--approach .sec-title--sm { font-size: clamp(24px, 2.8vw, 40px); }
.approach-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(28px, 3vw, 48px);
}
.approach-col { text-align: left; }
.approach-bar { display: block; width: 38px; height: 3px; background: var(--brand); margin-bottom: 16px; }
.approach-col h4 { font-size: clamp(18px, 1.5vw, 22px); font-weight: 700; color: var(--ink); margin: 0 0 10px; line-height: 1.35; }
.approach-col p { font-size: 15px; line-height: 1.7; color: var(--ink-2); margin: 0; max-width: 320px; }
@media (max-width: 900px) {
  .approach-grid { grid-template-columns: 1fr; gap: 30px; }
  .approach-col p { max-width: none; }
}

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 4px;
  font-size: 17.5px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  transition: color 0.25s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--brand); }
.faq-item summary .plus {
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  font-size: 16px;
  font-weight: 400;
  transition: transform 0.3s var(--ease), background 0.25s, color 0.25s, border-color 0.25s;
}
.faq-item[open] summary .plus { transform: rotate(45deg); background: var(--brand); border-color: var(--brand); color: #fff; }
.faq-item .faq-body { padding: 0 4px 26px; color: var(--ink-2); font-size: 15px; max-width: 720px; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 56px; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 18px; }
.contact-item {
  display: flex;
  gap: 18px;
  padding: 26px 28px;
  border-radius: var(--radius-lg);
  background: var(--white);
  border: 1px solid var(--line);
}
.contact-item .icon {
  flex: none;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--brand-tint);
  display: grid;
  place-items: center;
  font-size: 20px;
}
.contact-item h4 { font-size: 15px; font-weight: 800; margin-bottom: 4px; }
.contact-item p { font-size: 14.5px; color: var(--ink-2); word-break: break-all; }
.contact-item p b { color: var(--ink); font-size: 17px; }
.qr-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 26px 28px;
  border-radius: var(--radius-lg);
  background: var(--ink);
  color: #fff;
}
.qr-box {
  width: 108px;
  height: 108px;
  border-radius: 14px;
  background: repeating-conic-gradient(#fff 0% 25%, #d9d9d9 0% 50%) 50% / 16px 16px;
  flex: none;
  display: grid;
  place-items: center;
}
.qr-box span { font-size: 11px; color: var(--ink); background: #fff; padding: 3px 8px; border-radius: 6px; font-weight: 700; }
.qr-card h4 { font-size: 17px; font-weight: 800; }
.qr-card p { font-size: 13.5px; color: rgba(255, 255, 255, 0.6); margin-top: 4px; }

.form-card {
  padding: clamp(28px, 4vw, 48px);
  border-radius: var(--radius-lg);
  background: var(--white);
  border: 1px solid var(--line);
}
.form-card h3 { font-size: 24px; font-weight: 800; margin-bottom: 6px; }
.form-card > p { font-size: 14px; color: var(--ink-3); margin-bottom: 28px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { margin-bottom: 18px; }
.form-field label { display: block; font-size: 13.5px; font-weight: 700; margin-bottom: 8px; }
.form-field label i { font-style: normal; color: var(--brand); }
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  height: 50px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--light);
  color: var(--ink);
  outline: none;
  transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
}
.form-field textarea { height: auto; min-height: 128px; padding: 14px 18px; resize: vertical; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--brand);
  background: var(--white);
  box-shadow: 0 0 0 4px var(--brand-tint);
}
.form-note { font-size: 12.5px; color: var(--ink-3); margin-top: 14px; }
.form-success {
  display: none;
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: 14px;
  background: rgba(20, 114, 88, 0.1);
  color: var(--c-green);
  font-size: 14px;
  font-weight: 600;
}
.form-success.show { display: block; animation: pageIn 0.4s var(--ease); }

.map-block {
  margin-top: 24px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--light);
  height: 320px;
  display: grid;
  place-items: center;
  position: relative;
}
.map-block .pin {
  width: 46px;
  height: 46px;
  border-radius: 50% 50% 50% 4px;
  background: var(--brand);
  transform: rotate(-45deg);
  display: grid;
  place-items: center;
  box-shadow: 0 12px 28px rgba(0, 68, 255, 0.4);
  animation: pinBounce 2.2s var(--ease) infinite;
}
.map-block .pin::after { content: ""; width: 16px; height: 16px; background: #fff; border-radius: 50%; }
@keyframes pinBounce { 0%, 100% { margin-top: 0; } 50% { margin-top: -10px; } }
.map-block .map-label { position: absolute; bottom: 22px; font-size: 13px; color: var(--ink-3); }
.map-block--link { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; color: var(--ink); text-decoration: none; transition: border-color .25s var(--ease), background .25s var(--ease); }
.map-block--link:hover { border-color: var(--brand); background: #f4f7ff; }
.map-block--link .pin { margin: 0 0 12px; }
.map-block--link .map-kicker { color: var(--ink-3); font-size: 13px; letter-spacing: .1em; }
.map-block--link .map-label { position: static; color: var(--ink); font-size: 20px; font-weight: 700; }
.map-block--link .map-action { margin-top: 8px; color: var(--brand); font-size: 14px; font-weight: 700; }
.map-block--embed { display: block; background: #edf0f4; }
.map-block--embed iframe { width: 100%; height: 100%; border: 0; display: block; }
.map-nav { position: absolute; right: 18px; bottom: 18px; z-index: 2; display: inline-flex; align-items: center; height: 42px; padding: 0 18px; background: var(--brand); color: #fff; font-size: 14px; font-weight: 700; box-shadow: 0 8px 22px rgba(0,68,255,.28); transition: transform .2s var(--ease), background .2s var(--ease); }
.map-nav:hover { color: #fff; background: #003dcc; transform: translateY(-2px); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--dark); color: rgba(255, 255, 255, 0.66); padding: 80px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 48px; padding-bottom: 64px; }
.footer-brand .logo-img { height: 36px; }
.footer-brand p { margin-top: 20px; font-size: 14px; line-height: 1.8; max-width: 300px; }
.footer-phone { margin-top: 20px; font-size: 24px; font-weight: 800; color: #fff; letter-spacing: 0.02em; display: inline-block; }
.footer-phone:hover { color: var(--brand); }
.footer-brand .footer-address { margin-top: 10px; max-width: 360px; font-size: 14px; line-height: 1.8; }
.footer-col h4 { font-size: 15px; font-weight: 800; color: #fff; margin-bottom: 20px; }
.footer-col ul { display: flex; flex-direction: column; gap: 12px; }
.footer-col a, .footer-col li { font-size: 14px; transition: color 0.25s; }
.footer-col a:hover { color: var(--brand); }
.footer-bottom {
  border-top: 1px solid var(--line-dark);
  padding: 26px 0 30px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}
.footer-bottom a:hover { color: var(--brand); }

/* ---------- 联系页 Hero ---------- */
.contact-hero { margin-top: var(--header-h); background: var(--white); overflow: hidden; }
.contact-hero__inner {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(40px, 5vw, 72px);
  align-items: center;
  width: min(1200px, calc(100% - 48px));
  margin: 0 auto;
  padding: clamp(56px, 7vw, 100px) 0;
}
.crumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ink-3); margin-bottom: 26px; }
.crumb a { color: var(--ink-3); transition: color 0.25s; }
.crumb a:hover { color: var(--brand); }
.crumb i { font-style: normal; color: rgba(23, 25, 24, 0.25); }
.hero-eyebrow { font-size: 13px; font-weight: 700; letter-spacing: 0.16em; color: var(--brand); margin: 0 0 20px; }
.hero-eyebrow i { font-style: normal; color: var(--ink-3); margin: 0 8px; }
.contact-hero h1 { font-size: clamp(32px, 4.2vw, 54px); font-weight: 800; line-height: 1.24; letter-spacing: 0.01em; margin: 0 0 24px; }
.hero-lead { font-size: clamp(16px, 1.5vw, 19px); font-weight: 600; color: var(--ink-2); margin: 0 0 10px; }
.hero-note { font-size: 14.5px; line-height: 1.85; color: var(--ink-3); margin: 0 0 38px; max-width: 540px; }
.hero-cta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 24px 44px; }
.hero-meta { display: flex; flex-direction: column; gap: 7px; font-size: 13.5px; color: var(--ink-3); }
.hero-meta b { color: var(--ink); font-weight: 700; }
.contact-hero__art {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  aspect-ratio: 4 / 3.2;
}
.contact-hero__art img { width: 100%; height: 100%; object-fit: cover; display: block; }
/* 联系页收紧变体：顶部留白收紧、主标题缩小，联系方式与二维码进首屏
   本轮：align-items 恢复 stretch，左列改纵向 flex，联系方式块 margin-top:auto
   推到列底 —— 与右侧图片底边对齐（stretch 不改变顶对齐，只撑满行高） */
.contact-hero--tight .contact-hero__inner { padding: clamp(28px, 3.6vw, 46px) 0 clamp(40px, 4.5vw, 60px); align-items: stretch; }
.contact-hero--tight .contact-hero__text { display: flex; flex-direction: column; }
.contact-hero--tight .contact-hero__text .hero-contact { margin-top: auto; padding-top: 26px; }
.contact-hero--tight h1 { font-size: clamp(28px, 3.1vw, 40px); margin: 0 0 16px; }
.contact-hero--tight .hero-note { margin-bottom: 26px; }
.hero-contact { display: flex; flex-wrap: wrap; align-items: center; gap: 18px 30px; margin-top: 26px; }
.hero-meta a { color: inherit; text-decoration: none; }
.hero-meta a:hover { color: var(--brand); }
.hero-qr-wrap { display: flex; align-items: center; gap: 10px; }
.hero-qr { width: 74px; height: 74px; border-radius: 10px; border: 1px solid var(--line); display: block; }
.hero-qr-wrap > span { font-size: 12.5px; line-height: 1.5; color: var(--ink-3); }

/* ---------- 沟通方式四卡 ---------- */
.ways-title { font-size: clamp(26px, 3.2vw, 38px); font-weight: 800; letter-spacing: 0.01em; margin: 0 0 42px; }
.ways-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.way-card {
  display: flex;
  flex-direction: column;
  gap: 13px;
  padding: 28px 26px 24px;
  background: var(--light);
  border: 1px solid var(--line);
  border-radius: 20px;
  min-height: 200px;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s;
}
.way-card:hover { transform: translateY(-4px); box-shadow: 0 16px 36px rgba(23, 25, 24, 0.08); border-color: rgba(0, 68, 255, 0.32); }
.way-card h3 { font-size: 17px; font-weight: 700; margin: 0; }
.way-val { font-size: 15px; font-weight: 600; color: var(--ink-2); margin: 0; word-break: break-word; }
.way-val--muted { color: var(--ink-3); font-weight: 500; font-size: 14px; }
.way-qr { width: 112px; height: 112px; margin: auto 0 0; padding: 6px; background: #fff; border: 1px solid var(--line); border-radius: 12px; }
.way-links { margin-top: auto; display: flex; flex-wrap: wrap; gap: 8px 22px; padding-top: 6px; }
.way-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 0;
  border: 0;
  background: none;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand);
  cursor: pointer;
  transition: opacity 0.25s;
}
.way-link:hover { opacity: 0.72; }
.way-link--copy.is-done { color: var(--ink-3); }

/* ---------- 表单区（联系页居中） ---------- */
.sec--form .form-card { max-width: 820px; margin: 0 auto; }
.sec--form .map-block { max-width: 820px; margin: 24px auto 0; }

/* ---------- 案例详情页 ---------- */
.case-detail { margin-top: var(--header-h); background: var(--white); }
.case-detail__inner {
  width: min(1200px, calc(100% - 48px));
  margin: 0 auto;
  padding: clamp(36px, 5vw, 64px) 0 clamp(44px, 6vw, 76px);
}
.case-detail h1 { font-size: clamp(30px, 4vw, 48px); font-weight: 800; line-height: 1.26; letter-spacing: 0.01em; margin: 0 0 16px; }
.case-lead { font-size: clamp(16px, 1.5vw, 19px); font-weight: 600; color: var(--ink-2); margin: 0 0 14px; }
.case-desc { font-size: 15px; line-height: 1.95; color: var(--ink-3); margin: 0 0 40px; max-width: 780px; }
/* 五项规格信息条 */
.case-info {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 0 0 40px;
}
.case-info li { padding: 20px 22px 20px 0; border-right: 1px solid var(--line); }
.case-info li:last-child { border-right: none; padding-right: 0; }
.case-info span { display: block; font-size: 12px; font-weight: 600; letter-spacing: 0.1em; color: var(--ink-3); margin-bottom: 9px; }
.case-info b { display: block; font-size: 14px; font-weight: 700; color: var(--ink); line-height: 1.65; }
/* 图集区 */
.case-gallery { background: var(--light); }
/* 图集区：大图纵向堆叠（便于后续持续补充图片） */
.case-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(28px, 4vw, 56px);
  max-width: 980px;
  margin: 0 auto;
}
.case-figure { margin: 0; }
.case-figure__frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--dark-2);
  box-shadow: 0 24px 60px rgba(23, 25, 24, 0.1);
}
.case-figure__frame img { width: 100%; height: auto; display: block; cursor: zoom-in; }
.case-figure figcaption {
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--ink-3);
  text-align: center;
  letter-spacing: 0.01em;
}
/* 高清查看提示 */
.zoom-hint {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(11, 12, 14, 0.72);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}
.case-figure__frame:hover .zoom-hint { opacity: 1; transform: none; }
@media (max-width: 1080px) {
  .case-info { grid-template-columns: repeat(2, 1fr); }
  .case-info li { border-right: none; border-bottom: 1px solid var(--line); padding: 16px 20px 16px 0; }
  .case-info li:nth-child(odd) { border-right: 1px solid var(--line); padding-right: 20px; }
}
@media (max-width: 560px) {
  .case-info { grid-template-columns: 1fr; }
  .case-info li { border-right: none !important; }
  .case-flow { gap: 22px; }
}

/* ---------- 大图灯箱 ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(5, 6, 8, 0.94);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease);
}
.lightbox.open { opacity: 1; pointer-events: auto; }
.lightbox__img {
  max-width: 92vw;
  max-height: 86vh;
  object-fit: contain;
  border-radius: 6px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
}
.lightbox__btn {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 0;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.25s;
}
.lightbox__btn:hover { background: rgba(255, 255, 255, 0.22); }
.lightbox__close { top: 20px; right: 20px; width: 44px; height: 44px; border-radius: 50%; font-size: 22px; line-height: 1; }
.lightbox__prev, .lightbox__next { top: 50%; transform: translateY(-50%); width: 48px; height: 48px; border-radius: 50%; font-size: 26px; line-height: 1; }
.lightbox__prev { left: 20px; }
.lightbox__next { right: 20px; }
.lightbox__count {
  position: absolute;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.85);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

/* ---------- 右侧悬浮操作 ---------- */
.float-actions {
  position: fixed;
  right: 22px;
  bottom: 26px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.float-btn {
  width: 56px;
  padding: 14px 0 12px;
  border: 0;
  border-radius: 18px;
  background: var(--ink);
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  box-shadow: 0 10px 28px rgba(23, 25, 24, 0.25);
  transition: transform 0.3s var(--ease), background 0.3s;
}
.float-btn svg { width: 20px; height: 20px; }
.float-btn:hover { transform: scale(1.06); background: var(--brand); }
.float-btn--brand { background: var(--brand); }
.float-btn--brand:hover { background: var(--brand-deep); }
.float-btn--top {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  padding: 0;
  border-radius: 16px;
  background: var(--brand);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: transform 0.3s var(--ease), background 0.3s, opacity 0.3s, visibility 0.3s;
}
.float-btn--top.show { opacity: 1; visibility: visible; transform: none; }
.float-btn--top:hover { background: var(--brand-deep); }
.float-btn--top svg { width: 22px; height: 22px; }

/* ---------- 滚动显现动画 ---------- */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 图片占位（加载失败时显示渐变底） ---------- */
.art-fallback {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.2em;
}
.industry-card { background: linear-gradient(135deg, #23262b, #3a3f47); }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .container { width: calc(100% - 64px); }
  .site-header .container { width: calc(100% - 64px); }
  .logo-tagline { display: none; }
  .cap-grid { grid-template-columns: repeat(3, 1fr); }
  .case-grid, .industry-grid, .news-grid, .article-grid, .article-grid--three { grid-template-columns: repeat(2, 1fr); }
  .value-grid--four { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(2, 1fr); }
  /* 数据带：两列，竖线只保留在右侧一列，第二行加淡横线 */
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 20px 20px; }
  .stat + .stat { border-left: 0; }
  .stat:nth-child(odd) { padding-left: 0; }
  .stat:nth-child(even) { padding-right: 0; border-left: 1px solid rgba(255, 255, 255, 0.09); }
  .stat:nth-child(n + 3) { border-top: 1px solid rgba(255, 255, 255, 0.09); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  /* 联系页：Hero 改单列，四卡改两列 */
  .contact-hero__inner { grid-template-columns: 1fr; }
  .contact-hero__art { aspect-ratio: 16 / 9; max-height: 420px; }
  .ways-grid { grid-template-columns: repeat(2, 1fr); }
  .way-card { min-height: 200px; }
}
@media (max-width: 860px) {
  .container { width: calc(100% - 48px); }
  .sec { padding: 80px 0; }
  .main-nav, .header-phone, .header-actions .btn { display: none; }
  .nav-toggle { display: flex; }
  .banner { min-height: 560px; }
  .banner-inner { padding: clamp(48px, 12vh, 96px) 20px calc(15vh + 48px); }
  .service-block, .manifesto, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .service-block:nth-child(even) .service-copy { order: 0; }
  /* 首页尾部三栏：小屏两列 + 末项通栏，避免空位 */
  .hl-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .hl-item:last-child { grid-column: 1 / -1; }
  .value-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .float-actions { display: none; }
  /* 移动端抽屉菜单 */
  .main-nav {
    display: flex;
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: var(--white);
    padding: 20px 24px 32px;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 48px rgba(23, 25, 24, 0.12);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
    z-index: 99;
  }
  body.nav-open .main-nav { transform: none; opacity: 1; pointer-events: auto; }
  .main-nav a { padding: 14px 12px; font-size: 17px; border-radius: 12px; color: var(--ink); }
  .main-nav a::before { display: none; }
  .main-nav a:hover { color: var(--ink); background: rgba(23, 25, 24, 0.05); }
  .main-nav a.active { color: var(--ink); }
  .main-nav a.active::after { display: none; }
}
@media (max-width: 560px) {
  .case-grid, .industry-grid, .cap-grid, .hl-grid, .value-grid--four, .stats, .process, .news-grid, .article-grid, .article-grid--three { grid-template-columns: 1fr; }
  /* 数据带单列：竖线改横线，逐行分隔 */
  .stat { padding: 15px 0; }
  .stat:nth-child(n) { border-left: 0; }
  .stat:nth-child(n + 2) { border-top: 1px solid rgba(255, 255, 255, 0.09); }
  .stat:first-child { padding-top: 0; border-top: 0; }
  .stat:last-child { padding-bottom: 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .service-items { grid-template-columns: 1fr; }
  .sec { padding: 64px 0; }
  .banner-inner { padding: clamp(40px, 11vh, 72px) 12px calc(15vh + 48px); }
  .banner-title { letter-spacing: 0; max-width: calc(100vw - 96px); }
  .banner-tabs { bottom: 22px; gap: 8px; }
  .banner-tab { width: 18px; }
  .banner-tab.is-active { width: 32px; }
  /* 联系页移动端 */
  .contact-hero__inner { padding: 44px 0 56px; }
  .contact-hero__art { aspect-ratio: 4 / 3; }
  .hero-cta-row { gap: 20px; }
  .ways-title { margin-bottom: 28px; }
  .ways-grid { grid-template-columns: 1fr; }
  .way-card { min-height: 0; }
  .way-qr { width: 96px; height: 96px; }
}

/* ============================================================
   日 / 夜主题
   ============================================================ */
/* 顶栏图标切换 */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-right: -6px;
  color: #fff;
  opacity: 0.72;
  transition: opacity 0.25s var(--ease), color 0.25s var(--ease);
}
.theme-toggle:hover { opacity: 1; color: var(--brand); }
.theme-toggle svg { width: 21px; height: 21px; }
.theme-toggle .icon-sun { display: none; }
html[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
html[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* 夜间配色：把浅色板块压深，保留原有深浅交替的节奏 */
html[data-theme="dark"] {
  --ink: #f2f3f5;
  --ink-2: #b3b9c0;
  --ink-3: #7e858c;
  --line: rgba(255, 255, 255, 0.13);
  --light: #14171b;
  --white: #0e1013;
  --dark: #08090b;
  --dark-2: #16191e;
  --dark-3: #23272d;
  --brand-tint: rgba(0, 68, 255, 0.2);
  --c-green: #34c98f;
}
html[data-theme="dark"] body { background: #08090b; }
html[data-theme="dark"] .site-header { background: rgba(10, 11, 13, 0.92); }

/* 夜间模式下，跟随反色的浅色表面与控件（业务卡 / CTA 按钮 / 弹卡 / 二维码角标） */
html[data-theme="dark"] .cap-card { background: var(--dark-2); border-color: var(--line); color: #c9cdd3; }
html[data-theme="dark"] .cap-icon { color: #d6dae0; }
html[data-theme="dark"] .cap-line { background: rgba(255, 255, 255, 0.2); }
html[data-theme="dark"] .cap-tags { color: #9aa1a9; }
html[data-theme="dark"] .cap-desc { color: #878e97; }
html[data-theme="dark"] .cta-band .btn--dark { background: #171918; }
html[data-theme="dark"] .phone-pop--num,
html[data-theme="dark"] .phone-pop--num::after { background: var(--dark-3); box-shadow: 0 18px 44px rgba(0, 0, 0, 0.55); }
html[data-theme="dark"] .qr-box span { background: var(--dark-3); }

/* 深色模式下未跟随主题的浮层控件（右側悬浮按钮 / 表单成功提示） */
html[data-theme="dark"] .float-btn {
  background: var(--dark-2);
  color: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.4);
}
html[data-theme="dark"] .float-btn:hover { background: var(--brand); }
html[data-theme="dark"] .form-success {
  background: rgba(52, 201, 143, 0.14);
  color: #4fd1a0;
}
/* 以 --ink（近黑）作为背景的浅色控件，深色下会反相成浅底白字，需改用深色面 */
html[data-theme="dark"] .btn--dark {
  background: var(--dark-2);
  color: #fff;
  border: 1px solid var(--line);
}

/* ---------- 全站直角化：所有圆角统一改为直角 ---------- */
*, *::before, *::after { border-radius: 0 !important; }

/* ---------- 头部语言切换 CN / EN ---------- */
.lang-toggle { display: flex; align-items: center; margin: 0 2px 0 10px; }
.lang-toggle button {
  padding: 8px 9px;
  border: 0;
  background: none;
  font-family: "Bahnschrift", "DIN Alternate", "Arial Narrow", "Segoe UI", sans-serif;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
  color: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: color 0.2s;
}
.lang-toggle button:hover { color: #fff; }
.lang-toggle button.active { color: var(--brand); }

/* ---------- EN 模式：主要业务卡英文文案较长，适度收紧避免横向溢出 ---------- */
html[data-lang="en"] .cap-card h3 { font-size: 18px; }
html[data-lang="en"] .cap-desc { font-size: 12.5px; line-height: 1.8; }
html[data-lang="en"] .cap-tags { font-size: 11px; }
@media (max-width: 860px) {
  .lang-toggle button { padding: 8px 6px; }
}


.footer-bottom--center { justify-content: center; text-align: center; }
.footer-bottom--center a { color: inherit; }
.footer-bottom--center a:hover { color: var(--brand); }



/* ---------- FAQ：左右分栏（层级目录 + 答案面板） ---------- */
.faq-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: clamp(32px, 4vw, 64px);
  align-items: start;
}

/* 左侧：层级目录 */
.faq-side { position: sticky; top: calc(var(--header-h) + 20px); }
.faq-tree { list-style: none; margin: 0; padding: 0; }
.faq-cat { border-bottom: 1px solid var(--line); }
.faq-cat__head {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 18px 4px;
  background: none;
  border: 0;
  font: inherit;
  text-align: left;
  cursor: pointer;
  color: var(--ink);
  transition: color 0.25s var(--ease);
}
.faq-cat__head:hover { color: var(--brand); }
.faq-cat__label { flex: 1; font-size: 16.5px; font-weight: 700; line-height: 1.4; }
.faq-cat__caret {
  flex: none;
  width: 9px; height: 9px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 0.3s var(--ease);
  opacity: 0.55;
}
.faq-cat.is-open > .faq-cat__head .faq-cat__caret { transform: rotate(45deg); }

/* 子项：在父项下方折叠展开（grid-rows 过渡，容器高度与后续项目一起变化） */
.faq-cat__list-wrap {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.34s var(--ease);
}
.faq-cat.is-open > .faq-cat__list-wrap { grid-template-rows: 1fr; }
.faq-cat__list { overflow: hidden; list-style: none; margin: 0; padding: 0; min-height: 0; }
/* 子项轻微错峰：逐项渐入 */
.faq-cat__list li { opacity: 0; transform: translateY(-6px); transition: opacity 0.3s ease, transform 0.3s ease; }
.faq-cat.is-open > .faq-cat__list-wrap .faq-cat__list li { opacity: 1; transform: none; }
.faq-cat.is-open > .faq-cat__list-wrap .faq-cat__list li:nth-child(1) { transition-delay: .02s; }
.faq-cat.is-open > .faq-cat__list-wrap .faq-cat__list li:nth-child(2) { transition-delay: .05s; }
.faq-cat.is-open > .faq-cat__list-wrap .faq-cat__list li:nth-child(3) { transition-delay: .08s; }
.faq-cat.is-open > .faq-cat__list-wrap .faq-cat__list li:nth-child(4) { transition-delay: .11s; }
.faq-cat.is-open > .faq-cat__list-wrap .faq-cat__list li:nth-child(5) { transition-delay: .14s; }
.faq-cat.is-open > .faq-cat__list-wrap .faq-cat__list li:nth-child(6) { transition-delay: .17s; }
.faq-cat.is-open > .faq-cat__list-wrap .faq-cat__list li:nth-child(7) { transition-delay: .20s; }
.faq-cat.is-open > .faq-cat__list-wrap .faq-cat__list li:nth-child(8) { transition-delay: .23s; }
.faq-cat.is-open > .faq-cat__list-wrap .faq-cat__list li:nth-child(9) { transition-delay: .26s; }
.faq-cat.is-open > .faq-cat__list-wrap .faq-cat__list li:nth-child(10) { transition-delay: .29s; }

/* 子项（叶子节点，无子集、不展开，故不带头符号） */
.faq-q {
  display: block;
  padding: 11px 14px;
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--ink-2);
  text-decoration: none;
  border-radius: 8px;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.faq-q:hover { color: var(--brand); background: rgba(0,68,255,.05); }
.faq-q.is-active { color: var(--brand); font-weight: 700; background: rgba(0,68,255,.07); }

/* 右侧：答案面板 */
.faq-content { min-width: 0; }
.faq-ans { display: none; }
.faq-ans.is-active { display: block; animation: faqAnsIn .34s var(--ease); }
@keyframes faqAnsIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.faq-ans__q { margin: 0 0 22px; font-size: clamp(22px, 2.4vw, 30px); font-weight: 800; line-height: 1.35; color: var(--ink); }
.faq-ans__a { font-size:16px; line-height:1.9; color: var(--ink-2); max-width: 760px; }

/* FAQ 图表：用图形补充文字较少的答案 */
.faq-figure { margin: 28px 0 0; max-width: 760px; }
.fig-cap { margin: 14px 0 0; font-size: 13px; color: var(--ink-3); letter-spacing: .02em; }

/* 横向条形图 */
.fig-bars { display: grid; gap: 14px; }
.fig-bar { display: grid; grid-template-columns: 92px 1fr auto; align-items: center; gap: 12px; }
.fig-bar__label { font-size: 14px; color: var(--ink-2); }
.fig-bar__track { height: 12px; background: var(--line); border-radius: 99px; overflow: hidden; }
.fig-bar__fill { display: block; height: 100%; border-radius: 99px; background: linear-gradient(90deg, var(--brand), #3d77ff); }
.fig-bar__val { font-size: 13px; font-weight: 700; color: var(--ink); white-space: nowrap; }

/* 指标卡 */
.fig-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.fig-stat { padding: 18px 14px; background: #f4f6fb; border: 1px solid var(--line); border-radius: 12px; text-align: center; }
.fig-stat__val { display: block; font-size: 22px; font-weight: 800; color: var(--brand); line-height: 1.2; }
.fig-stat__label { display: block; margin-top: 6px; font-size: 13px; color: var(--ink-2); }

/* 比例分段条（付款节奏） */
.fig-split { display: flex; height: 40px; border-radius: 10px; overflow: hidden; }
.fig-split__seg { display: flex; align-items: center; justify-content: center; color: #fff; font-size: 13px; font-weight: 700; padding: 0 10px; }
.fig-split__seg:not(.fig-split__seg--alt) { background: var(--brand); }
.fig-split__seg--alt { background: #3d77ff; }
.fig-legend { list-style: none; display: flex; gap: 20px; margin: 12px 0 0; padding: 0; font-size: 13px; color: var(--ink-2); }
.fig-legend li { display: flex; align-items: center; gap: 7px; }
.fig-legend .dot { width: 10px; height: 10px; border-radius: 3px; background: var(--brand); flex: none; }
.fig-legend .dot--alt { background: #3d77ff; }

/* 大数字 callout */
.fig-callout__num { font-size: 46px; font-weight: 800; color: var(--brand); line-height: 1.1; }
.fig-callout__label { margin: 8px 0 0; font-size: 15px; color: var(--ink-2); }

/* 深色模式图表 */
html[data-theme="dark"] .fig-stat { background: var(--dark-2); }
html[data-theme="dark"] .fig-bar__track { background: var(--dark-2); }

/* 窄屏：指标卡与条形图自适应 */
@media (max-width: 560px) {
  .fig-stats { grid-template-columns: 1fr; }
  .fig-bar { grid-template-columns: 72px 1fr auto; }
}

/* 深色模式 */
html[data-theme="dark"] .faq-cat { border-bottom-color: var(--line); }
html[data-theme="dark"] .faq-q:hover { background: var(--dark-2); }
html[data-theme="dark"] .faq-q.is-active { background: var(--dark-2); }

/* 英文模式 */
html[data-lang="en"] .faq-cat__label { font-size: 15px; }
html[data-lang="en"] .faq-q { font-size: 14px; }
html[data-lang="en"] .faq-ans__a { font-size: 15px; line-height: 1.8; }

/* 响应式：窄屏堆叠为单列 */
@media (max-width: 920px) {
  .faq-layout { grid-template-columns: 1fr; gap: 26px; }
  .faq-side { position: static; }
  .faq-ans__a { max-width: none; }
}

/* ============================================================
   常见问题页（faq.html）
   ============================================================ */

/* 页头图：faq-hero.jpg 当前为临时占位（沿用 services 头图），
   客户提供正式头图后同名覆盖 assets/img/faq-hero.jpg 即可 */
.page-hero--faq {
  background: var(--dark) url("../img/faq-hero.jpg?v=20261027a") center / cover no-repeat;
}
.faq-disclaimer { display:inline-block; margin-top:12px; font-size:13px; line-height:1.6; color:inherit; opacity:.78; }
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }
.faq-content { position:relative; }
.faq-content > .faq-search { position:absolute; top:0; right:0; width:min(34%, 320px); z-index:2; }
.faq-search__panel { position:relative; width:100%; }
.faq-search__panel[hidden] { display:none; }
.faq-search__panel input { width:100%; height:46px; padding:0 48px 0 15px; border:1px solid var(--line); border-radius:0; background:#fff; color:var(--ink); font:inherit; font-size:14px; outline:none; }
.faq-search__panel input::placeholder { color:var(--ink-3); }
.faq-search__panel input:focus { border-color:var(--brand); }
.faq-search__clear { position:absolute; top:0; right:0; width:46px; height:46px; color:var(--ink-2); background:transparent; border:0; font-size:24px; font-weight:300; cursor:pointer; }
.faq-search__status { min-height:19px; margin:7px 0 0; color:var(--ink-2); font-size:13px; line-height:1.45; }
.faq-ans__q { padding-right:min(38%, 360px); }
@media(max-width:920px){.faq-content > .faq-search{position:static;width:100%;margin:0 0 26px}.faq-ans__q{padding-right:0}}