/* ==========================================================================
   方维网络 官网样式表
   设计基调：简约大气、专业清晰
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 变量与基础
   -------------------------------------------------------------------------- */
:root {
  --navy: #0a1f3c;
  --navy-2: #123763;
  --navy-3: #0d2a4e;
  --brand: #1288c3;
  --brand-dark: #0c6796;
  --brand-soft: #e8f5fb;
  --brand-line: #c6e6f4;
  --teal: #0fa98f;
  --ink: #0e1a2b;
  --ink-2: #4a5a72;
  --ink-3: #7d8ca2;
  --line: #e4e9f2;
  --line-2: #eff3f9;
  --bg: #ffffff;
  --bg-soft: #f6f9fd;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(14, 26, 43, .05);
  --shadow: 0 12px 32px -14px rgba(14, 26, 43, .16);
  --shadow-lg: 0 28px 60px -24px rgba(14, 26, 43, .26);
  --container: 1200px;
  --header-h: 74px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "WenQuanYi Micro Hei",
    Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-2);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.01em;
}

p { margin: 0 0 16px; }
p:last-child { margin-bottom: 0; }

a { color: var(--brand); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--brand-dark); }

img { max-width: 100%; height: auto; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; }
mark { background: rgba(18, 136, 195, .12); color: var(--brand-dark); padding: 0 4px; border-radius: 4px; }

::selection { background: rgba(18, 136, 195, .16); }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow { max-width: 880px; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
  background: var(--navy);
  color: #fff;
  padding: 10px 18px;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; color: #fff; }

.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;
}

/* --------------------------------------------------------------------------
   2. 按钮与链接
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  cursor: pointer;
  white-space: nowrap;
  transition: all .2s ease;
}

.btn-sm { padding: 9px 20px; font-size: 14px; }
.btn-lg { padding: 15px 32px; font-size: 16px; }
.btn-block { width: 100%; }

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 10px 24px -12px rgba(18, 136, 195, .7);
}
.btn-primary:hover {
  background: var(--brand-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 14px 30px -12px rgba(18, 136, 195, .8);
}

.btn-outline {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
}
.btn-outline:hover {
  border-color: var(--brand);
  color: var(--brand);
  transform: translateY(-1px);
}

.btn-light {
  background: #fff;
  color: var(--navy);
  box-shadow: 0 12px 30px -14px rgba(0, 0, 0, .5);
}
.btn-light:hover { color: var(--brand); transform: translateY(-1px); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 15px;
  color: var(--brand);
}
.link-arrow::after {
  content: "";
  width: 14px; height: 8px;
  background: currentColor;
  -webkit-mask: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 8'%3E%3Cpath d='M0 4h11M8 1l3.2 3L8 7' stroke='black' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat center / contain;
  mask: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 8'%3E%3Cpath d='M0 4h11M8 1l3.2 3L8 7' stroke='black' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat center / contain;
  transition: transform .2s ease;
}
.link-arrow:hover::after { transform: translateX(4px); }

/* --------------------------------------------------------------------------
   3. 网站头部
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line-2);
  transition: box-shadow .2s ease, border-color .2s ease;
}
.site-header.is-scrolled {
  box-shadow: 0 6px 24px -18px rgba(14, 26, 43, .5);
  border-bottom-color: var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: var(--header-h);
}

.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand-mark { display: block; line-height: 0; }
.brand-mark svg { display: block; }
.brand-logo {
  display: block;
  width: auto;
  max-width: 200px;
  height: 46px;
}
.brand-logo-box {
  display: inline-flex;
  align-items: center;
  /* logo 已换成透明背景，页脚深色底上不再垫白色圆角块 */
}
.brand-logo-light {
  height: 40px;
  /* 深色页脚上把 logo 统一反成纯白剪影（蓝圆/深色文字都变白） */
  filter: brightness(0) invert(1);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 18px; font-weight: 700; letter-spacing: .02em; }
.brand-text em {
  font-style: normal;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--ink-3);
  text-transform: uppercase;
}

.main-nav { margin-left: auto; }
.nav-list { display: flex; align-items: center; gap: 4px; }
.nav-item { position: relative; }

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: 10px;
  font-size: 15.5px;
  font-weight: 500;
  color: var(--ink-2);
}
.nav-link:hover { color: var(--ink); background: var(--bg-soft); }
.nav-item.is-active > .nav-link { color: var(--brand); font-weight: 600; }

.caret {
  width: 8px; height: 8px;
  margin-top: -2px;
  border-right: 1.6px solid currentColor;
  border-bottom: 1.6px solid currentColor;
  transform: rotate(45deg);
  opacity: .55;
  transition: transform .2s ease;
}
.nav-item.has-children:hover .caret { transform: rotate(225deg); margin-top: 3px; }

.nav-drop {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  min-width: 300px;
  padding: 10px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: all .2s ease;
}
.nav-item.has-children:hover .nav-drop,
.nav-item.has-children:focus-within .nav-drop {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.nav-drop::before {
  content: "";
  position: absolute;
  top: -6px; left: 50%;
  width: 10px; height: 10px;
  margin-left: -5px;
  background: #fff;
  border-left: 1px solid var(--line);
  border-top: 1px solid var(--line);
  transform: rotate(45deg);
}
.nav-drop li + li { margin-top: 2px; }
.nav-drop a {
  display: block;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  transition: background .16s ease;
}
.nav-drop a:hover { background: var(--brand-soft); }
.drop-title { display: block; font-size: 15px; font-weight: 600; color: var(--ink); }
.drop-desc { display: block; font-size: 12.5px; color: var(--ink-3); line-height: 1.5; margin-top: 2px; }

.nav-mobile-foot { display: none; }

.header-actions { display: flex; align-items: center; gap: 16px; }
.header-tel { display: flex; flex-direction: column; line-height: 1.25; text-align: right; }
.header-tel-label { font-size: 11px; color: var(--ink-3); letter-spacing: .08em; }
.header-tel-num { font-size: 16px; font-weight: 700; color: var(--ink); letter-spacing: .01em; }
.header-tel-num:hover { color: var(--brand); }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 18px; height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --------------------------------------------------------------------------
   4. 区块通用
   -------------------------------------------------------------------------- */
.section { padding: 96px 0; }
.section-soft { background: var(--bg-soft); }

.section-dark {
  background:
    radial-gradient(1100px 500px at 12% -10%, rgba(18, 136, 195, .28), transparent 62%),
    radial-gradient(900px 460px at 96% 8%, rgba(15, 169, 143, .16), transparent 60%),
    linear-gradient(160deg, #08192f 0%, var(--navy) 48%, #102b4f 100%);
  color: rgba(255, 255, 255, .82);
}
.section-dark h2, .section-dark h3 { color: #fff; }
.section-dark .sec-eyebrow { color: rgba(255, 255, 255, .74); }
.section-dark .sec-eyebrow::before { background: rgba(255, 255, 255, .4); }
.section-dark .sec-desc { color: rgba(255, 255, 255, .66); }

.section-head { max-width: 720px; margin-bottom: 52px; }
.section-head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  max-width: none;
}

.sec-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--brand);
  text-transform: uppercase;
}
.sec-eyebrow::before {
  content: "";
  width: 22px; height: 2px;
  background: var(--brand);
  border-radius: 2px;
}
.sec-title {
  font-size: clamp(25px, 2.7vw, 36px);
  margin-bottom: 16px;
}
.sec-desc { font-size: 16.5px; color: var(--ink-2); max-width: 640px; }

.grid { display: grid; gap: 24px; }
.g-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* --------------------------------------------------------------------------
   5. 首页首屏
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 76px 0 96px;
  background:
    radial-gradient(760px 420px at 82% 4%, rgba(18, 136, 195, .13), transparent 62%),
    linear-gradient(180deg, #f4f8ff 0%, #ffffff 78%);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(14, 26, 43, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 26, 43, .035) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(720px 420px at 78% 12%, #000 0%, transparent 72%);
  mask-image: radial-gradient(720px 420px at 78% 12%, #000 0%, transparent 72%);
  pointer-events: none;
}

/* 首屏 3D 视觉层（Three.js 绘制，纯装饰）
   左侧是正文区，用遮罩压淡，保证文字对比度不受影响 */
.hero-fx {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: block;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0;
  -webkit-mask-image: radial-gradient(115% 110% at 22% 44%, rgba(0, 0, 0, .04) 0%, rgba(0, 0, 0, .42) 32%, rgba(0, 0, 0, 1) 70%);
  mask-image: radial-gradient(115% 110% at 22% 44%, rgba(0, 0, 0, .04) 0%, rgba(0, 0, 0, .42) 32%, rgba(0, 0, 0, 1) 70%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.04fr .96fr;
  gap: 64px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 22px;
  padding: 7px 16px 7px 12px;
  background: #fff;
  border: 1px solid var(--brand-line);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--brand);
}
.eyebrow::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 4px rgba(18, 136, 195, .16);
}

.hero h1 {
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.2;
  letter-spacing: -.02em;
  margin-bottom: 22px;
}
.hero h1 .hl {
  position: relative;
  color: var(--brand);
  white-space: nowrap;
}
.hero h1 .hl::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 4px;
  height: 9px;
  background: rgba(18, 136, 195, .14);
  border-radius: 4px;
  z-index: -1;
}

.hero-lead {
  font-size: 17.5px;
  line-height: 1.8;
  color: var(--ink-2);
  max-width: 540px;
  margin-bottom: 32px;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 30px; }

.hero-trust { display: flex; flex-wrap: wrap; gap: 10px 26px; }
.hero-trust li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  color: var(--ink-2);
}
.hero-trust li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 12px; height: 7px;
  border-left: 2px solid var(--teal);
  border-bottom: 2px solid var(--teal);
  transform: rotate(-45deg);
}

.hero-visual { position: relative; }

.ask-card {
  position: relative;
  padding: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.ask-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.ask-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 4px rgba(15, 169, 143, .14);
}
.ask-q {
  margin: 0 0 18px;
  padding: 14px 16px;
  background: var(--bg-soft);
  border-radius: 12px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}
.answer {
  padding: 18px;
  border: 1px dashed var(--brand-line);
  border-radius: 14px;
  background: linear-gradient(180deg, #fbfdff 0%, #f5f9ff 100%);
}
.answer-label {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--brand);
  text-transform: uppercase;
}
.answer ul { display: grid; gap: 10px; }
.answer li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-2);
}
.answer li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--brand);
  opacity: .55;
}
.cites {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}
.cites-label { font-size: 12px; color: var(--ink-3); }
.cites i {
  font-style: normal;
  padding: 3px 10px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  font-size: 12px;
  color: var(--ink-2);
}

.float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
}
.float-card strong { display: block; font-size: 14px; color: var(--ink); }
.float-card em { font-style: normal; font-size: 12px; color: var(--ink-3); }
.fc-ico {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px; height: 30px;
  border-radius: 9px;
  background: var(--brand-soft);
  color: var(--brand);
  font-weight: 700;
  font-size: 15px;
}
.fc-ico.is-ok { background: rgba(15, 169, 143, .12); color: var(--teal); }
.fc-1 { top: -26px; right: -18px; }
.fc-2 { bottom: -26px; left: -22px; }

/* --------------------------------------------------------------------------
   5.1 首屏内容联动高亮（hero-3d.js 按检索进度点亮真实卡片元素）
   -------------------------------------------------------------------------- */
.ask-q {
  transition: box-shadow .5s ease, background-color .5s ease;
}
.ask-q.is-asking {
  background: #eef6fd;
  box-shadow: 0 0 0 3px rgba(18, 136, 195, .12);
}

.cites i {
  transition: background-color .45s ease, border-color .45s ease,
    color .45s ease, box-shadow .45s ease;
}
.cites i.is-hit {
  background: var(--brand-soft);
  border-color: var(--brand-line);
  color: var(--brand);
  box-shadow: 0 0 0 3px rgba(18, 136, 195, .1);
}

.answer li { transition: color .45s ease; }
.answer li.is-lit { color: var(--ink); }
.answer li.is-lit::before {
  opacity: 1;
  box-shadow: 0 0 0 4px rgba(18, 136, 195, .14);
}

.answer mark.is-pulse {
  animation: fw-mark-pulse 1.8s ease-out;
}
@keyframes fw-mark-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(18, 136, 195, 0); }
  22%  { box-shadow: 0 0 0 6px rgba(18, 136, 195, .22); }
  100% { box-shadow: 0 0 0 0 rgba(18, 136, 195, 0); }
}

@media (prefers-reduced-motion: reduce) {
  .ask-q, .cites i, .answer li { transition: none; }
  .answer mark.is-pulse { animation: none; }
}

/* --------------------------------------------------------------------------
   6. 卡片
   -------------------------------------------------------------------------- */
.card {
  position: relative;
  padding: 30px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}
.section-soft .card { border-color: #e7edf6; }

.card:hover {
  transform: translateY(-3px);
  border-color: var(--brand-line);
  box-shadow: var(--shadow);
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px; height: 46px;
  margin-bottom: 20px;
  border-radius: 13px;
  background: var(--brand-soft);
  color: var(--brand);
}
.card-icon svg { width: 23px; height: 23px; }
.card-icon-lg { width: 58px; height: 58px; border-radius: 16px; }
.card-icon-lg svg { width: 28px; height: 28px; }

.card-title { font-size: 19px; margin-bottom: 10px; }
.card-title a { color: var(--ink); }
.card-title a:hover { color: var(--brand); }
.card-sub { font-size: 14px; font-weight: 600; color: var(--brand); margin-bottom: 12px; }
.card-desc { font-size: 15px; line-height: 1.78; color: var(--ink-2); margin-bottom: 18px; }
.card-desc:last-child { margin-bottom: 0; }

.s-card { display: flex; flex-direction: column; }
.s-card .link-arrow { margin-top: auto; }

.m-card { padding-top: 34px; }
.m-no {
  display: inline-block;
  margin-bottom: 16px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--brand);
}

/* ---- 首页图片版块 ---- */
.scene-card { padding-top: 0; overflow: hidden; }
.scene-pic,
.ind-pic { margin: -1px -31px 20px; border-bottom: 1px solid var(--line-2); }
.scene-pic img,
.ind-pic img { display: block; width: 100%; object-fit: cover; background: var(--brand-soft); }
.scene-pic img { aspect-ratio: 16 / 10; }
.ind-pic img { height: 140px; }
.about-pic {
  margin: 30px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 20px 44px -24px rgba(18, 136, 195, .38);
}
.about-pic img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; background: var(--brand-soft); }

.ind-card { text-align: left; padding-top: 0; overflow: hidden; }
.ind-card .card-title { font-size: 18px; }
.ind-card .card-desc { margin-bottom: 0; }

.a-card { padding: 28px; }

/* 优势条目为奇数张时，最后一张占满整行，避免两栏布局右侧留空 */
.g-2 .a-card:last-child:nth-child(odd) { grid-column: 1 / -1; }

.cap-card { display: flex; flex-direction: column; }
.cap-card .card-desc { margin-bottom: 0; }

.n-card { display: flex; flex-direction: column; }
.n-card .card-desc { flex: 1; }
.n-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--ink-3);
}
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 12.5px;
  font-weight: 600;
}
a.tag:hover { background: var(--brand); color: #fff; }

.chip {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-2);
}

/* --------------------------------------------------------------------------
   7. 左右分栏
   -------------------------------------------------------------------------- */
.split {
  display: grid;
  grid-template-columns: .82fr 1.18fr;
  gap: 56px;
  align-items: start;
}
.split-2 { grid-template-columns: 1.25fr .75fr; align-items: stretch; }
.split-head .sec-title { margin-bottom: 18px; }
.split-head p { font-size: 16px; line-height: 1.8; }
.split-head .btn { margin-top: 12px; }
.split-grid { gap: 20px; }

.side-card {
  padding: 30px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.side-card-title { font-size: 18px; margin-bottom: 20px; }
.rule-list { display: grid; gap: 18px; margin-bottom: 22px; }
.rule-list li {
  padding-left: 18px;
  border-left: 2px solid var(--brand-line);
}
.rule-list strong { display: block; font-size: 15.5px; color: var(--ink); margin-bottom: 4px; }
.rule-list span { font-size: 14.5px; color: var(--ink-2); line-height: 1.7; }

/* --------------------------------------------------------------------------
   8. 流程
   -------------------------------------------------------------------------- */
.steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 20px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 28px 22px;
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--radius);
  backdrop-filter: blur(6px);
}
.step::after {
  content: "";
  position: absolute;
  top: 47px;
  right: -10px;
  width: 20px; height: 1px;
  background: rgba(255, 255, 255, .22);
}
.step:last-child::after { display: none; }
.step-no {
  display: block;
  margin-bottom: 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .16em;
  color: #6fc6ec;
}
.step h3 { font-size: 17px; margin-bottom: 10px; }
.step p { font-size: 14.5px; line-height: 1.75; color: rgba(255, 255, 255, .68); margin: 0; }

/* --------------------------------------------------------------------------
   9. 时间线 / 原则 / 边界
   -------------------------------------------------------------------------- */
.timeline {
  position: relative;
  display: grid;
  gap: 0;
  padding-left: 8px;
}
.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 28px;
  padding: 26px 0 26px 34px;
  border-left: 1px solid var(--line);
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -6px; top: 34px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: #fff;
  border: 2.5px solid var(--brand);
}
.timeline-stage {
  display: inline-block;
  align-self: start;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}
.timeline-body h3 { font-size: 18px; margin-bottom: 8px; }
.timeline-body p { font-size: 15px; line-height: 1.8; margin: 0; }

.principles {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  counter-reset: principle;
}
.principles li {
  position: relative;
  padding: 28px 24px 28px 24px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  line-height: 1.6;
}
.principles li::before {
  counter-increment: principle;
  content: "0" counter(principle);
  display: block;
  margin-bottom: 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .16em;
  color: #6fc6ec;
}

.scope-card {
  padding: 32px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #fff;
}
.scope-card.is-do { border-color: rgba(15, 169, 143, .3); background: linear-gradient(180deg, #f6fffc 0%, #fff 60%); }
.scope-card.is-dont { border-color: var(--line); background: var(--bg-soft); }
.scope-title { font-size: 18px; margin-bottom: 20px; }
.scope-list { display: grid; gap: 14px; }
.scope-list li {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 12px;
  font-size: 15px;
  line-height: 1.72;
}
.scope-ico {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px; height: 22px;
  margin-top: 3px;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
}
.is-do .scope-ico { background: rgba(15, 169, 143, .14); color: var(--teal); }
.is-dont .scope-ico { background: #eef1f6; color: var(--ink-3); }

/* --------------------------------------------------------------------------
   10. 常见问题
   -------------------------------------------------------------------------- */
.faq-list { display: grid; gap: 12px; }
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  overflow: hidden;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.faq-item[open] {
  border-color: var(--brand-line);
  box-shadow: var(--shadow-sm);
}
.faq-item summary {
  position: relative;
  padding: 18px 54px 18px 22px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "";
  position: absolute;
  right: 22px; top: 50%;
  width: 9px; height: 9px;
  margin-top: -6px;
  border-right: 2px solid var(--ink-3);
  border-bottom: 2px solid var(--ink-3);
  transform: rotate(45deg);
  transition: transform .2s ease;
}
.faq-item[open] summary::after { transform: rotate(225deg); margin-top: -2px; }
.faq-body {
  padding: 0 22px 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-2);
  border-top: 1px solid var(--line-2);
  padding-top: 16px;
  margin: 0 0 0;
}

/* --------------------------------------------------------------------------
   11. 行动号召条
   -------------------------------------------------------------------------- */
.cta-band {
  position: relative;
  overflow: hidden;
  padding: 72px 0;
  background:
    radial-gradient(700px 340px at 88% 10%, rgba(18, 136, 195, .38), transparent 62%),
    linear-gradient(150deg, #08192f 0%, var(--navy) 52%, #11305a 100%);
}
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 44px;
}
.cta-copy h2 { color: #fff; font-size: clamp(24px, 2.6vw, 32px); margin-bottom: 12px; }
.cta-copy p { color: rgba(255, 255, 255, .66); font-size: 16px; margin: 0; max-width: 560px; }
.cta-actions { display: flex; flex-direction: column; align-items: center; gap: 12px; flex: none; }
.cta-tel { color: rgba(255, 255, 255, .72); font-size: 14px; }
.cta-tel:hover { color: #fff; }

/* --------------------------------------------------------------------------
   12. 内页头部
   -------------------------------------------------------------------------- */
.page-hero {
  padding: 56px 0 60px;
  background:
    radial-gradient(720px 340px at 88% -20%, rgba(18, 136, 195, .14), transparent 62%),
    linear-gradient(180deg, #f4f8ff 0%, #fbfdff 100%);
  border-bottom: 1px solid var(--line-2);
}
.page-hero h1 {
  font-size: clamp(28px, 3.4vw, 42px);
  margin-bottom: 16px;
}
.page-lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-2);
  max-width: 720px;
  margin: 0;
}
.page-hero-detail .detail-head {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-bottom: 18px;
}
.page-hero-detail h1 { margin-bottom: 8px; }

.crumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
  font-size: 13.5px;
  color: var(--ink-3);
}
.crumb a { color: var(--ink-3); }
.crumb a:hover { color: var(--brand); }
.crumb span { color: var(--line); }
.crumb em { font-style: normal; color: var(--ink-2); }

.page-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 40px;
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}
.page-facts li { display: flex; flex-direction: column; gap: 4px; }
.page-facts span { font-size: 12.5px; letter-spacing: .06em; color: var(--ink-3); }
.page-facts strong { font-size: 15.5px; font-weight: 600; color: var(--ink); }

/* --------------------------------------------------------------------------
   13. 服务列表与详情
   -------------------------------------------------------------------------- */
.svc-list { display: grid; gap: 20px; }
.svc-block {
  display: grid;
  grid-template-columns: 1.55fr .85fr;
  gap: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .22s ease, box-shadow .22s ease;
}
.svc-block:hover { border-color: var(--brand-line); box-shadow: var(--shadow); }
.svc-main { display: flex; gap: 22px; padding: 34px; }
.svc-body { min-width: 0; }
.svc-title { font-size: 21px; margin-bottom: 8px; }
.svc-meta { margin: 16px 0 18px; }
.svc-side {
  padding: 34px 30px;
  background: var(--bg-soft);
  border-left: 1px solid var(--line);
}
.svc-side-title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin: 0 0 16px;
}

.dot-list { display: grid; gap: 11px; }
.dot-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ink-2);
}
.dot-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--brand);
  opacity: .6;
}
.dot-list-muted li::before { background: var(--ink-3); }

.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 56px;
  align-items: start;
}
.detail-layout-article { grid-template-columns: minmax(0, 1fr) 320px; }

.prose { font-size: 16px; line-height: 1.9; color: var(--ink-2); }
.prose h3 {
  font-size: 20px;
  margin: 38px 0 14px;
  padding-left: 14px;
  border-left: 3px solid var(--brand);
  line-height: 1.5;
}
.prose h3:first-child { margin-top: 0; }
.prose p { margin: 0 0 18px; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose ul, .prose ol { margin: 0 0 18px; padding-left: 0; display: grid; gap: 10px; }
.prose li { position: relative; padding-left: 20px; }
.prose li::before {
  content: "";
  position: absolute;
  left: 2px; top: 11px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--brand);
  opacity: .55;
}

.info-block {
  margin-top: 40px;
  padding: 30px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.info-title { font-size: 17px; margin-bottom: 18px; }

.check-list { display: grid; gap: 13px; }
.check-list li {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 12px;
  font-size: 15px;
  line-height: 1.75;
}
.ck {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px; height: 22px;
  margin-top: 3px;
  border-radius: 50%;
  background: rgba(15, 169, 143, .13);
  color: var(--teal);
  font-size: 12.5px;
  font-weight: 700;
  line-height: 1;
}
.check-list-lg li { font-size: 16px; }

.detail-aside { display: grid; gap: 20px; position: sticky; top: calc(var(--header-h) + 24px); }
.aside-card {
  padding: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.aside-title { font-size: 16px; margin-bottom: 16px; }
.aside-card-cta {
  background: linear-gradient(180deg, #f7faff 0%, #fff 100%);
  border-color: var(--brand-line);
}
.aside-card-cta p { font-size: 14.5px; line-height: 1.75; margin-bottom: 18px; }
.aside-card-cta .btn { margin-bottom: 12px; }
.aside-tel { display: block; text-align: center; font-size: 14px; color: var(--ink-3); }
.aside-tel:hover { color: var(--brand); }

.muted-note {
  margin-top: 18px;
  padding-left: 14px;
  border-left: 2px solid var(--brand-line);
  font-size: 14px;
  color: var(--ink-3);
}

/* --------------------------------------------------------------------------
   14. 资讯
   -------------------------------------------------------------------------- */
.filter-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}
.filter-chip {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-2);
}
.filter-chip:hover { border-color: var(--brand-line); color: var(--brand); }
.filter-chip.is-active {
  background: var(--navy);
  border-color: var(--navy);
  color: #fff;
  font-weight: 600;
}
.filter-count { margin-left: auto; font-size: 13.5px; color: var(--ink-3); }

.empty-state {
  padding: 60px 0;
  text-align: center;
  color: var(--ink-3);
  font-size: 15.5px;
}

.pager {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 52px;
}
.pager-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 42px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  font-size: 14.5px;
  color: var(--ink-2);
  transition: all .18s ease;
}
a.pager-item:hover { border-color: var(--brand); color: var(--brand); }
.pager-item.is-active {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  font-weight: 600;
}
.pager-item.is-disabled { color: #c3ccd9; background: var(--bg-soft); cursor: not-allowed; }
.pager-gap { color: var(--ink-3); padding: 0 4px; }

.page-hero-article { padding-bottom: 52px; }
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 20px;
  font-size: 13.5px;
  color: var(--ink-3);
}
.page-hero-article h1 {
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.35;
  margin-bottom: 18px;
  max-width: 980px;
}
.article-summary {
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-2);
  margin: 0;
  padding-left: 18px;
  border-left: 3px solid var(--brand-line);
  max-width: 800px;
}

.post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 48px;
}
.post-nav-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  transition: all .2s ease;
}
.post-nav-item span { font-size: 12.5px; color: var(--ink-3); letter-spacing: .06em; }
.post-nav-item strong {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
a.post-nav-item:hover { border-color: var(--brand-line); box-shadow: var(--shadow-sm); }
a.post-nav-item:hover strong { color: var(--brand); }
.post-nav-item.is-next { text-align: right; }
.post-nav-item.is-empty { background: var(--bg-soft); }
.post-nav-item.is-empty strong { color: var(--ink-3); font-weight: 500; }

.article-note {
  margin-top: 32px;
  padding: 20px 24px;
  background: var(--bg-soft);
  border-radius: var(--radius-sm);
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-3);
}

.aside-post-list { display: grid; gap: 16px; }
.aside-post-list li { padding-bottom: 14px; border-bottom: 1px dashed var(--line); }
.aside-post-list li:last-child { padding-bottom: 0; border-bottom: 0; }
.aside-post-list a {
  display: block;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.6;
  margin-bottom: 4px;
}
.aside-post-list a:hover { color: var(--brand); }
.aside-post-list time { font-size: 12.5px; color: var(--ink-3); }

/* --------------------------------------------------------------------------
   15. 联系我们
   -------------------------------------------------------------------------- */
.contact-layout {
  display: grid;
  grid-template-columns: 380px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}
.contact-info { display: grid; gap: 16px; }
.info-card {
  padding: 24px 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color .2s ease;
}
.info-card:hover { border-color: var(--brand-line); }
.info-label { display: block; font-size: 12.5px; letter-spacing: .08em; color: var(--ink-3); margin-bottom: 8px; }
.info-value { display: block; font-size: 20px; font-weight: 700; color: var(--ink); letter-spacing: .01em; }
.info-value-sm { font-size: 16px; font-weight: 600; line-height: 1.6; }
a.info-value:hover { color: var(--brand); }
.info-note { display: block; margin-top: 6px; font-size: 13.5px; color: var(--ink-3); }
.info-card-company { background: var(--bg-soft); }

.contact-form-wrap {
  padding: 40px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.form-title { font-size: 24px; margin-bottom: 8px; }
.form-sub { font-size: 15px; color: var(--ink-3); margin-bottom: 28px; }

.form-alert {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  line-height: 1.7;
  margin-bottom: 24px;
}
.form-alert.is-ok {
  background: rgba(15, 169, 143, .08);
  border: 1px solid rgba(15, 169, 143, .3);
  color: #0b7a67;
}
.form-alert.is-ok strong { font-size: 15.5px; }
.form-alert.is-error {
  background: #fff5f5;
  border: 1px solid #f6c9c9;
  color: #c0392b;
}

.contact-form { display: grid; gap: 20px; }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }

.field { display: flex; flex-direction: column; gap: 8px; }
.field-label { font-size: 14px; font-weight: 600; color: var(--ink); }
.field-label .req { font-style: normal; color: #e05b5b; }
.field-hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

.contact-form input[type="text"],
.contact-form input[type="tel"],
.contact-form input[type="email"],
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fcfdff;
  font-family: inherit;
  font-size: 15px;
  color: var(--ink);
  transition: border-color .18s ease, box-shadow .18s ease, background .18s ease;
}
.contact-form textarea { resize: vertical; min-height: 120px; line-height: 1.75; }
.contact-form select { appearance: none; background-image: none; cursor: pointer; }
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  background: #fff;
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(18, 136, 195, .1);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: #a7b2c2; }

.form-foot {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 6px;
  flex-wrap: wrap;
}
.form-tip { font-size: 13.5px; color: var(--ink-3); margin: 0; flex: 1; min-width: 220px; }

/* 验证码行 */
.field-captcha .captcha-box {
  display: flex;
  align-items: center;
  gap: 10px;
}
.field-captcha .captcha-box input[type="text"] {
  flex: 1;
  min-width: 0;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.captcha-img {
  width: 140px;
  height: 48px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #f8fafd;
  cursor: pointer;
  flex-shrink: 0;
}
.captcha-refresh {
  border: none;
  background: none;
  padding: 0;
  font-family: inherit;
  font-size: 13.5px;
  color: var(--brand);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}
.captcha-refresh:hover { text-decoration: underline; color: var(--brand-dark); }
.field-hint { font-size: 12.5px; color: var(--ink-3); }
@media (max-width: 640px) {
  .field-captcha .captcha-box { flex-wrap: wrap; }
  .captcha-img { width: 124px; height: 44px; }
}


/* --------------------------------------------------------------------------
   16. 页脚
   -------------------------------------------------------------------------- */
.site-footer {
  padding: 72px 0 32px;
  background: linear-gradient(180deg, #08192f 0%, #061428 100%);
  color: rgba(255, 255, 255, .62);
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.35fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.brand-light { color: #fff; }
.brand-light:hover { color: #fff; }
.brand-light .brand-text strong { color: #fff; }
.brand-light .brand-text em { color: rgba(255, 255, 255, .5); }
.footer-slogan {
  margin: 20px 0 12px;
  font-size: 15.5px;
  color: rgba(255, 255, 255, .78);
  line-height: 1.7;
}
.footer-note { font-size: 13.5px; line-height: 1.8; color: rgba(255, 255, 255, .45); }
.footer-contact-quick { margin-top: 22px; display: flex; flex-direction: column; gap: 4px; }
.footer-tel {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  letter-spacing: .01em;
}
.footer-tel:hover { color: #6fc6ec; }
.footer-contact-quick span { font-size: 13px; color: rgba(255, 255, 255, .45); }

.footer-col h3 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: .04em;
}
.footer-col ul { display: grid; gap: 12px; }
.footer-col a, .footer-col span { font-size: 14.5px; color: rgba(255, 255, 255, .62); line-height: 1.6; }
.footer-col a:hover { color: #fff; }

.footer-contact-list li { display: grid; grid-template-columns: 72px 1fr; gap: 10px; align-items: baseline; }
.fc-label { font-size: 13px !important; color: rgba(255, 255, 255, .42) !important; }

/* 底部 / 联系页 - 微信二维码 */
.fc-qr { display: flex; align-items: center; gap: 12px; }
.fc-qr .fc-label { align-self: center; }
.fc-qr-img {
  width: 72px; height: 72px;
  display: block; border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, .18);
  background: #fff; padding: 3px;
}
.info-card-qr img.info-qr-img {
  display: block; margin-top: 10px;
  width: 112px; height: 112px;
  border-radius: 10px; border: 1px solid var(--brand-line);
  background: #fff; padding: 4px;
}

/* 友情链接（仅首页页脚输出，链接在新窗口打开） */
.footer-links {
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, .1);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 0;
}
.footer-links-title {
  flex: none;
  margin: 0 18px 0 0;
  font-size: 14px;
  font-weight: 600;
  color: rgba(255, 255, 255, .86);
}
.footer-links-list { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 0; }
.footer-links-list li { display: flex; align-items: center; font-size: 13.5px; line-height: 1.8; }
.footer-links-list li + li::before {
  content: '';
  width: 1px;
  height: 12px;
  margin: 0 12px;
  background: rgba(255, 255, 255, .16);
}
.footer-links-list a { color: rgba(255, 255, 255, .6); transition: color .2s ease; }
.footer-links-list a:hover { color: #6fc6ec; }

.footer-bottom {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  padding-top: 28px;
  font-size: 13.5px;
}
.footer-copy { margin: 0; color: rgba(255, 255, 255, .48); display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.footer-copy a { color: rgba(255, 255, 255, .55); }
.footer-copy a:hover { color: #fff; }
.footer-copy .sep { color: rgba(255, 255, 255, .2); }
.footer-statement {
  margin: 0;
  max-width: 460px;
  color: rgba(255, 255, 255, .38);
  line-height: 1.75;
  text-align: right;
}

/* --------------------------------------------------------------------------
   17. 404
   -------------------------------------------------------------------------- */
.error-page { padding: 100px 0 120px; background: linear-gradient(180deg, #f6f9ff 0%, #fff 70%); }
.error-inner { text-align: center; max-width: 640px; }
.error-code {
  margin: 0 0 8px;
  font-size: clamp(72px, 12vw, 120px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.04em;
  background: linear-gradient(160deg, var(--brand) 0%, var(--navy) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.error-title { font-size: 26px; margin-bottom: 14px; }
.error-desc { font-size: 16px; color: var(--ink-2); margin-bottom: 8px; }
.error-hint { font-size: 14.5px; color: var(--ink-3); margin-bottom: 30px; }
.error-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; margin-bottom: 40px; }
.error-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 18px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font-size: 14.5px;
  color: var(--ink-3);
}

/* --------------------------------------------------------------------------
   18. 效果保障与平台覆盖
   -------------------------------------------------------------------------- */
.section-pay {
  background:
    radial-gradient(620px 300px at 12% 0%, rgba(18, 136, 195, .07), transparent 66%),
    #ffffff;
}
.pay-card {
  display: flex;
  flex-direction: column;
  border-color: var(--brand-line);
  background: linear-gradient(180deg, #ffffff 0%, #fbfdff 100%);
}
.pay-card .card-icon {
  background: var(--navy);
  color: #fff;
}
.pay-card .card-desc { margin-bottom: 0; }

.pay-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  margin-top: 30px;
  padding: 24px 28px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.pay-note p {
  margin: 0;
  max-width: 840px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-2);
}
.pay-note strong { color: var(--ink); }
.pay-note .link-arrow { white-space: nowrap; }

.platform-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
  padding: 0;
  margin: 0;
  list-style: none;
}
.platform-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 26px 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}
.platform-card:hover {
  transform: translateY(-3px);
  border-color: var(--brand-line);
  box-shadow: var(--shadow);
}
.platform-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px; height: 46px;
  margin-bottom: 16px;
  border-radius: 13px;
  background: var(--navy);
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .01em;
}
.platform-card strong { font-size: 16.5px; color: var(--ink); margin-bottom: 4px; }
.platform-card em {
  font-style: normal;
  font-size: 13px;
  color: var(--ink-3);
  margin-bottom: 12px;
}
.platform-card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--ink-2);
}

/* 承诺条（复用 hero-trust 样式，用于内页顶部） */
.promise-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
  padding: 0;
  list-style: none;
}
.promise-inline li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 15px 8px 12px;
  background: #fff;
  border: 1px solid var(--brand-line);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}
.promise-inline li::before {
  content: "";
  width: 12px; height: 7px;
  border-left: 2px solid var(--brand);
  border-bottom: 2px solid var(--brand);
  transform: rotate(-45deg) translateY(-1px);
}

.section-head-offset { margin-top: 58px; }

/* --------------------------------------------------------------------------
   19. 响应式
   -------------------------------------------------------------------------- */
@media (max-width: 1120px) {
  .hero-inner { grid-template-columns: 1fr; gap: 56px; }
  .hero-visual { max-width: 560px; }
  .fc-1 { right: -8px; }
  .fc-2 { left: -8px; }
  .split, .split-2 { grid-template-columns: 1fr; gap: 36px; }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .step::after { display: none; }
  .principles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .g-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .platform-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .pay-note { flex-direction: column; align-items: flex-start; gap: 16px; }
  .footer-top { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px; }
  .detail-layout, .detail-layout-article { grid-template-columns: 1fr; gap: 40px; }
  .detail-aside { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .aside-card-cta { grid-column: span 1; }
}

@media (max-width: 980px) {
  :root { --header-h: 66px; }
  .header-actions .header-tel { display: none; }
  .nav-toggle { display: flex; }

  /* 关键：移动端去掉 backdrop-filter。
     它会把 sticky 头部变成 fixed 后代的包含块，
     导致全屏菜单 .main-nav（position:fixed）被困在 66px 高的头部内而显示不全 */
  .site-header {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: #fff;
  }

  .main-nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    bottom: 0;
    left: 0;
    margin: 0;
    padding: 20px 24px 40px;
    background: #fff;
    overflow-y: auto;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .22s ease, transform .22s ease, visibility .22s;
    border-top: 1px solid var(--line);
  }
  .main-nav.is-open { opacity: 1; visibility: visible; transform: translateY(0); }

  .nav-list { flex-direction: column; align-items: stretch; gap: 2px; }
  .nav-item { border-bottom: 1px solid var(--line-2); }
  .nav-item:last-child { border-bottom: 0; }
  .nav-link {
    justify-content: space-between;
    padding: 16px 4px;
    border-radius: 0;
    font-size: 17px;
    font-weight: 600;
    color: var(--ink);
  }
  .nav-link:hover { background: transparent; }
  .caret { display: none; }

  .nav-drop {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    min-width: 0;
    padding: 0 0 12px;
    border: 0;
    box-shadow: none;
    border-radius: 0;
  }
  .nav-drop::before { display: none; }
  .nav-drop a { padding: 10px 12px; background: var(--bg-soft); margin-bottom: 6px; }
  .nav-drop li + li { margin-top: 0; }

  .nav-mobile-foot { display: grid; gap: 14px; margin-top: 28px; }
  .nav-mobile-tel { margin: 0; text-align: center; font-size: 14px; color: var(--ink-3); }
  .nav-mobile-tel a { font-weight: 700; color: var(--ink); }
}

@media (max-width: 860px) {
  .section { padding: 64px 0; }
  .section-head { margin-bottom: 36px; }
  .section-head-row { flex-direction: column; align-items: flex-start; gap: 16px; }
  .g-2, .g-3, .g-4 { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
  .steps { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; }
  .svc-block { grid-template-columns: 1fr; }
  .svc-side { border-left: 0; border-top: 1px solid var(--line); }
  .svc-main { padding: 26px; }
  .svc-side { padding: 24px 26px; }
  .contact-layout { grid-template-columns: 1fr; gap: 32px; }
  .contact-form-wrap { padding: 28px 22px; }
  .form-row { grid-template-columns: 1fr; }
  .cta-inner { flex-direction: column; align-items: flex-start; gap: 28px; }
  .cta-actions { align-items: flex-start; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav-item.is-next { text-align: left; }
  .footer-top { grid-template-columns: 1fr; gap: 36px; }
  .footer-bottom { flex-direction: column; gap: 12px; }
  .footer-statement { text-align: left; }
  .timeline-item { grid-template-columns: 1fr; gap: 10px; padding-left: 24px; }
  .timeline-stage { justify-self: start; }
  .detail-aside { grid-template-columns: 1fr; }
  .page-facts { gap: 14px 28px; }
  .faq-item summary { padding: 16px 48px 16px 18px; font-size: 15.5px; }
  .faq-body { padding: 14px 18px 18px; }
  .article-note { padding: 18px; }
}

@media (max-width: 560px) {
  .container { padding: 0 18px; }
  .hero { padding: 48px 0 72px; }
  .hero-actions .btn { width: 100%; }
  .float-card { display: none; }
  .ask-card { padding: 20px; }
  .card { padding: 24px; }
  .info-card { padding: 20px; }
  .page-hero { padding: 40px 0 44px; }
  .filter-count { margin-left: 0; width: 100%; }
  .footer-tel { font-size: 21px; }
  .brand-text em { display: none; }
}

/* --------------------------------------------------------------------------
   19. 打印与动效偏好
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  html { scroll-behavior: auto; }
}

@media print {
  .site-header, .cta-band, .nav-drop, .nav-toggle, .float-card { display: none !important; }
  body { color: #000; }
  .section { padding: 20px 0; }
  a { color: #000; text-decoration: underline; }
}

/* 首屏 3D 视觉层：窄屏改为单列，视觉重心下移到卡片区 */
@media (max-width: 1120px) {
  .hero-fx {
    -webkit-mask-image: radial-gradient(128% 76% at 50% 86%, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, .46) 54%, rgba(0, 0, 0, .05) 100%);
    mask-image: radial-gradient(128% 76% at 50% 86%, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, .46) 54%, rgba(0, 0, 0, .05) 100%);
  }
}

@media print {
  .hero-fx { display: none !important; }
}

/* --------------------------------------------------------------------------
   20. 全站动效层（由 js/motion.js 配合，html.fw-motion 为总开关）
   -------------------------------------------------------------------------- */

/* ---- 20.1 关键帧 ---- */
@keyframes fw-sweep {
  0%   { transform: translateX(-30%) rotate(16deg); opacity: 0; }
  10%  { opacity: .85; }
  62%  { opacity: .85; }
  78%  { transform: translateX(330%) rotate(16deg); opacity: 0; }
  100% { transform: translateX(330%) rotate(16deg); opacity: 0; }
}
@keyframes fw-shine {
  0%   { left: -70%; opacity: 0; }
  18%  { opacity: 1; }
  100% { left: 125%; opacity: 0; }
}
@keyframes fw-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-9px); }
}
@keyframes fw-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(111, 198, 236, .42); }
  70%      { box-shadow: 0 0 0 9px rgba(111, 198, 236, 0); }
}

/* ---- 20.2 滚动显现：初始态 ---- */
.fw-motion .fw-rv {
  opacity: 0;
  transition:
    opacity .72s cubic-bezier(.22, .61, .36, 1),
    transform .8s cubic-bezier(.22, .61, .36, 1),
    filter .8s ease;
  transition-delay: var(--fw-d, 0ms);
  will-change: opacity, transform;
}
.fw-motion .fw-rv-up    { transform: translate3d(0, 32px, 0); }
.fw-motion .fw-rv-left  { transform: translate3d(-38px, 0, 0); }
.fw-motion .fw-rv-right { transform: translate3d(38px, 0, 0); }
.fw-motion .fw-rv-zoom  { transform: scale(.93) translate3d(0, 16px, 0); }
.fw-motion .fw-rv-focus { transform: scale(1.05); filter: blur(9px); }
.fw-motion .fw-rv-fade  { opacity: 0; }

.fw-motion .fw-rv.is-in {
  opacity: 1;
  transform: none;
  filter: none;
}

/* 显现过程中被视口截断的长列表，不残留 will-change */
.fw-motion .fw-rv.is-in { will-change: auto; }

/* ---- 20.3 顶部阅读进度条 ---- */
.fw-progress {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 2px;
  z-index: 9999;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--brand) 0%, #38b6e8 55%, var(--teal) 100%);
  box-shadow: 0 0 10px rgba(18, 136, 195, .45);
  pointer-events: none;
}

/* ---- 20.4 卡片：图标弹入 + 指针柔光 ---- */
.fw-motion .card.fw-rv .card-icon {
  opacity: 0;
  transform: scale(.84);
  transition: opacity .45s ease .1s, transform .55s cubic-bezier(.34, 1.4, .64, 1) .1s;
}
.fw-motion .card.fw-rv.is-in .card-icon { opacity: 1; transform: none; }

.fw-motion .card,
.fw-motion .platform-card,
.fw-motion .svc-block,
.fw-motion .info-card,
.fw-motion .side-card,
.fw-motion .ask-card,
.fw-motion .contact-form-wrap { position: relative; }

.fw-motion .card::after,
.fw-motion .platform-card::after,
.fw-motion .svc-block::after,
.fw-motion .info-card::after,
.fw-motion .side-card::after,
.fw-motion .ask-card::after,
.fw-motion .contact-form-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity .42s ease;
  background: radial-gradient(320px circle at var(--fw-mx, 50%) var(--fw-my, 50%),
    rgba(18, 136, 195, .15), rgba(18, 136, 195, 0) 62%);
}
.fw-motion .card:hover::after,
.fw-motion .platform-card:hover::after,
.fw-motion .svc-block:hover::after,
.fw-motion .info-card:hover::after,
.fw-motion .side-card:hover::after,
.fw-motion .ask-card:hover::after,
.fw-motion .contact-form-wrap:hover::after { opacity: 1; }

/* 数字卡片的编号：字距收紧 + 上浮 */
.fw-motion .m-card.fw-rv .m-no {
  opacity: 0;
  transform: translateY(9px);
  letter-spacing: .34em;
  transition: opacity .5s ease .06s,
    transform .62s cubic-bezier(.22, .61, .36, 1) .06s,
    letter-spacing .78s cubic-bezier(.22, .61, .36, 1) .06s;
}
.fw-motion .m-card.fw-rv.is-in .m-no { opacity: 1; transform: none; letter-spacing: .14em; }

/* ---- 20.5 服务流程：随滚动逐步点亮 ---- */
.fw-motion .step {
  transition: background-color .55s ease, border-color .55s ease,
    box-shadow .55s ease, transform .25s ease;
}
.fw-motion .step::after { transition: background .55s ease; }
.fw-motion .step-no { transition: color .5s ease, text-shadow .5s ease; }

.fw-motion .step.is-lit {
  background-color: rgba(30, 108, 178, .24);
  border-color: rgba(111, 198, 236, .4);
  box-shadow: 0 20px 46px -26px rgba(111, 198, 236, .75);
}
.fw-motion .step.is-lit::after {
  background: linear-gradient(90deg, rgba(111, 198, 236, .9), rgba(111, 198, 236, .12));
}
.fw-motion .step.is-lit .step-no {
  color: #a5e0f7;
  text-shadow: 0 0 14px rgba(111, 198, 236, .65);
}
.fw-motion .step.is-lit .step-no::after {
  content: "";
  display: inline-block;
  width: 5px; height: 5px;
  margin-left: 8px;
  vertical-align: middle;
  border-radius: 50%;
  background: #6fc6ec;
  animation: fw-pulse 2.2s ease-out infinite;
}

/* ---- 20.6 发展过程：时间轴随滚动生长 ---- */
.fw-motion .timeline { position: relative; }
.fw-motion .fw-tl-line {
  position: absolute;
  left: 7px; top: 0;
  width: 2px; height: 0;
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(18, 136, 195, .25), var(--brand) 65%, #38b6e8);
  box-shadow: 0 0 8px rgba(18, 136, 195, .35);
  pointer-events: none;
}
.fw-motion .timeline-item { transition: border-color .45s ease; }
.fw-motion .timeline-item::before {
  transition: background .45s ease, border-color .45s ease, box-shadow .45s ease;
}
.fw-motion .timeline-item.is-lit { border-left-color: var(--brand-line); }
.fw-motion .timeline-item.is-lit::before {
  background: var(--brand);
  border-color: var(--brand);
  box-shadow: 0 0 0 5px rgba(18, 136, 195, .13);
}

/* ---- 20.7 行动号召条：光带流动 ---- */
.fw-motion .cta-band::after {
  content: "";
  position: absolute;
  top: -70%; left: -34%;
  width: 34%; height: 240%;
  pointer-events: none;
  background: linear-gradient(90deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(111, 198, 236, .17) 45%,
    rgba(255, 255, 255, 0) 100%);
  animation: fw-sweep 8.5s ease-in-out infinite;
}
.fw-motion .cta-band > .container { position: relative; z-index: 1; }

/* ---- 20.8 按钮光泽 ---- */
.fw-motion .btn { position: relative; overflow: hidden; }
.fw-motion .btn::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0; left: -70%;
  width: 52%;
  pointer-events: none;
  opacity: 0;
  transform: skewX(-18deg);
  background: linear-gradient(100deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, .42) 50%,
    rgba(255, 255, 255, 0) 100%);
}
.fw-motion .btn:hover::after { animation: fw-shine .78s ease; }

/* ---- 20.9 首屏悬浮小卡：缓慢浮动 ---- */
.fw-motion .fc-1 { animation: fw-float 6.8s ease-in-out infinite; }
.fw-motion .fc-2 { animation: fw-float 8.2s ease-in-out .9s infinite; }

/* ---- 20.10 内页首屏：节点网络画布 ---- */
.fw-motion .page-hero { position: relative; overflow: hidden; }
.fw-motion .page-hero > .container { position: relative; z-index: 1; }
.fw-motion .fw-page-fx {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(98deg,
    rgba(0, 0, 0, 0) 4%, rgba(0, 0, 0, .18) 34%,
    rgba(0, 0, 0, .8) 72%, #000 100%);
  mask-image: linear-gradient(98deg,
    rgba(0, 0, 0, 0) 4%, rgba(0, 0, 0, .18) 34%,
    rgba(0, 0, 0, .8) 72%, #000 100%);
}

/* 窄屏：节点网络让位于文字 */
@media (max-width: 760px) {
  .fw-motion .fw-page-fx {
    -webkit-mask-image: linear-gradient(180deg,
      rgba(0, 0, 0, 0) 42%, rgba(0, 0, 0, .7) 100%);
    mask-image: linear-gradient(180deg,
      rgba(0, 0, 0, 0) 42%, rgba(0, 0, 0, .7) 100%);
  }
}

/* ---- 20.11 首页第二屏数据流背景（js/section-flow.js） ---- */
.section-flow { position: relative; overflow: hidden; }
.section-flow > .container { position: relative; z-index: 1; }
.fw-flow-fx {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg,
    rgba(0, 0, 0, 0) 0%, #000 14%, #000 86%, rgba(0, 0, 0, 0) 100%);
  mask-image: linear-gradient(180deg,
    rgba(0, 0, 0, 0) 0%, #000 14%, #000 86%, rgba(0, 0, 0, 0) 100%);
}
@media (prefers-reduced-motion: reduce) {
  .fw-flow-fx { display: none; }
}
@media print {
  .fw-flow-fx { display: none !important; }
}

/* ---- 20.12 打印与降级 ---- */@media (prefers-reduced-motion: reduce) {
  .fw-motion .fw-rv { opacity: 1; transform: none; filter: none; transition: none; }
  .fw-progress { display: none; }
  .fw-motion .fw-page-fx { display: none; }
}
@media print {
  .fw-progress, .fw-page-fx { display: none !important; }
  .fw-motion .fw-rv { opacity: 1 !important; transform: none !important; filter: none !important; }
}