/* ==========================================================================
   深圳艾瑞熙信息技术有限公司 — 企业官网样式表
   配色：莫兰迪蓝（主）+ 中国红（点缀）  |  风格：简约大气、克制留白
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  /* 莫兰迪蓝：低饱和灰蓝，视觉更柔和 */
  --navy-900: #2C4A56;
  --navy-800: #3B6272;
  --navy-700: #4C7686;
  --blue-700: #4A6E7D;
  --blue-600: #5A7D8E;
  --blue-500: #7A9DAB;
  --blue-300: #B6D0DB;
  --blue-100: #E0EEF3;
  --blue-50:  #F2F8FA;

  --red-700: #B32418;
  --red-600: #DE3A1F;
  --red-500: #F05A2C;
  --red-100: #FBD9CF;
  --red-50:  #FEF3EF;
  --red-grad: linear-gradient(115deg, #F05A2C 0%, #DE3A1F 52%, #C4181C 100%);

  --ink:    #1A2630;
  --body:   #536371;
  --muted:  #7E96A3;
  --line:   #DDE8ED;
  --line-2: #EDF3F6;
  --bg:     #FFFFFF;
  --bg-alt: #F6F9FA;

  --radius:    4px;
  --radius-lg: 6px;

  --shadow-sm: 0 1px 2px rgba(44, 74, 86, .05), 0 2px 8px rgba(44, 74, 86, .04);
  --shadow-md: 0 6px 20px rgba(44, 74, 86, .07);
  --shadow-lg: 0 18px 48px rgba(44, 74, 86, .13);

  --maxw: 1180px;
  --ease: cubic-bezier(.22, .61, .36, 1);

  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
          "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
}

/* ---------- 2. 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.75;
  color: var(--body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5 {
  margin: 0;
  color: var(--ink);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -.01em;
}

p { margin: 0; }

a { color: inherit; text-decoration: none; transition: color .2s var(--ease); }

img, svg { display: block; max-width: 100%; }

ul, ol { margin: 0; padding: 0; list-style: none; }

button, input, textarea, select { font: inherit; color: inherit; }

::selection { background: var(--blue-100); color: var(--navy-900); }

/* ---------- 3. 布局工具 ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

.section { padding: 96px 0; }
.section--tight { padding: 72px 0; }
.section--alt { background: var(--bg-alt); }
.section--dark { background: var(--navy-900); color: var(--blue-100); }
.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4 { color: #fff; }

.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 4. 标题组 ---------- */
.sec-head { max-width: 720px; margin-bottom: 56px; }
.sec-head--center { margin-left: auto; margin-right: auto; text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--blue-600);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--red-600);
}

.sec-head h2 {
  font-size: 34px;
  line-height: 1.4;
  letter-spacing: -.02em;
}
.sec-head p {
  margin-top: 18px;
  font-size: 16px;
  color: var(--body);
}

.section--dark .eyebrow { color: var(--blue-300); }
.section--dark .sec-head p { color: rgba(255, 255, 255, .72); }

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 46px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .02em;
  cursor: pointer;
  white-space: nowrap;
  transition: all .22s var(--ease);
}
.btn svg { width: 16px; height: 16px; flex: none; }

.btn--primary { background: var(--red-grad); color: #fff; }
.btn--primary:hover {
  background: linear-gradient(115deg, #DE3A1F 0%, #C4181C 100%);
  box-shadow: 0 8px 22px rgba(222, 58, 31, .3);
  transform: translateY(-1px);
}

.btn--blue { background: var(--blue-600); color: #fff; }
.btn--blue:hover { background: var(--navy-800); transform: translateY(-1px); }

.btn--ghost { border-color: var(--line); color: var(--ink); background: #fff; }
.btn--ghost:hover { border-color: var(--blue-500); color: var(--blue-600); }

.btn--on-dark { border-color: rgba(255, 255, 255, .28); color: #fff; }
.btn--on-dark:hover { background: rgba(255, 255, 255, .1); border-color: rgba(255, 255, 255, .5); }

.btn--outline {
  border-color: var(--line);
  color: var(--ink);
  background: transparent;
}
.btn--outline:hover {
  border-color: var(--blue-600);
  color: var(--blue-600);
  background: var(--blue-50);
}

.btn--lg { height: 52px; padding: 0 34px; font-size: 16px; }

/* ---------- 6. 头部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease);
}
.site-header.is-stuck { box-shadow: 0 4px 20px rgba(44, 74, 86, .07); }

/* 首页 Hero 顶部导航：初始透明，滚动后恢复 */
.site-header.header--hero {
  background: transparent;
  border-bottom-color: transparent;
  backdrop-filter: none;
}
.site-header.header--hero.is-stuck {
  background: rgba(255, 255, 255, .96);
  border-bottom-color: var(--line);
  backdrop-filter: saturate(180%) blur(12px);
}
.site-header.header--hero .nav__toggle {
  background: rgba(255, 255, 255, .55);
  border-color: rgba(26, 38, 48, .12);
}
.site-header.header--hero.is-stuck .nav__toggle {
  background: #fff;
  border-color: var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

/* 品牌标识 */
.brand { display: flex; align-items: center; gap: 13px; }
.brand__logo {
  height: 34px;
  width: auto;
  flex: none;
  object-fit: contain;
}
.brand__mark {
  position: relative;
  width: 38px;
  height: 38px;
  border-radius: var(--radius);
  background: var(--navy-900);
  flex: none;
  display: grid;
  place-items: center;
  overflow: hidden;
}
.brand__mark span {
  color: #fff;
  font-size: 19px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
}
.brand__mark::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 15px;
  height: 15px;
  background: var(--red-600);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}
.brand__text { line-height: 1.25; }
.brand__name { font-size: 17px; font-weight: 600; color: var(--ink); letter-spacing: .01em; }
.brand__sub {
  font-size: 10.5px;
  letter-spacing: .19em;
  text-transform: uppercase;
  color: var(--muted);
}

/* 菜单 */
.nav__menu { display: flex; align-items: center; gap: 40px; }
.nav__menu a {
  position: relative;
  font-size: 15px;
  color: var(--body);
  padding: 4px 0;
}
.nav__menu a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--red-600);
  transition: width .26s var(--ease);
}
.nav__menu a:hover { color: var(--navy-900); }
.nav__menu a:hover::after,
.nav__menu a.is-active::after { width: 100%; }
.nav__menu a.is-active { color: var(--navy-900); font-weight: 500; }

.nav__actions { display: flex; align-items: center; gap: 16px; }
.nav__tel {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--blue-600);
  font-weight: 500;
}
.nav__tel svg { width: 15px; height: 15px; }

/* 汉堡按钮 */
.nav__toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  cursor: pointer;
  padding: 0;
  place-items: center;
}
.nav__toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  position: relative;
  transition: background .2s;
}
.nav__toggle span::before,
.nav__toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  transition: transform .25s var(--ease);
}
.nav__toggle span::before { top: -6px; }
.nav__toggle span::after { top: 6px; }
.nav__toggle.is-open span { background: transparent; }
.nav__toggle.is-open span::before { transform: translateY(6px) rotate(45deg); }
.nav__toggle.is-open span::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 7. 首页 Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--blue-50);
  color: var(--ink);
}

/* 背景图 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('../images/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  z-index: 0;
}

/* 莫兰迪蓝浅色遮罩，保证文字可读 */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    rgba(242, 248, 250, .94) 0%,
    rgba(242, 248, 250, .82) 52%,
    rgba(242, 248, 250, .64) 100%
  );
  z-index: 1;
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 64px;
  align-items: center;
  padding: 108px 0 116px;
}

.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 32px;
  padding: 0 14px;
  border: 1px solid rgba(26, 38, 48, .12);
  border-radius: 999px;
  background: rgba(255, 255, 255, .55);
  font-size: 13px;
  color: var(--body);
  margin-bottom: 30px;
}
.hero__tag i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--red-500);
  box-shadow: 0 0 0 4px rgba(222, 58, 31, .14);
}

.hero h1 {
  font-size: clamp(19px, 2.6vw, 35px);
  line-height: 1.22;
  letter-spacing: .015em;
  font-weight: 700;
  white-space: nowrap;
  background-image: linear-gradient(96deg, #8e1218 0%, #b81f28 30%, #d0352c 60%, #e4573a 86%, #ef7a52 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.hero h1::after {
  content: "";
  display: block;
  width: 104px;
  height: 3px;
  margin-top: 16px;
  border-radius: 2px;
  background: linear-gradient(90deg, #b81f28, #e4573a 52%, rgba(200, 32, 42, .9) 74%, rgba(200, 32, 42, 0));
}
.hero h1 em {
  font-style: normal;
  position: relative;
  white-space: nowrap;
  background-image: linear-gradient(96deg, #b81f28 0%, #d4282f 38%, #ef7a52 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.hero h1 em::after {
  content: "";
  position: absolute;
  left: 2%;
  right: 2%;
  bottom: -3px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, rgba(200, 32, 42, 0), #d4282f 50%, rgba(200, 32, 42, 0));
}

.hero__desc {
  margin-top: 26px;
  max-width: 520px;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--body);
}

.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 40px; }

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 46px;
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid rgba(26, 38, 48, .1);
}
.hero__meta dl { margin: 0; }
.hero__meta dt {
  font-size: 27px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.2;
  letter-spacing: -.02em;
}
.hero__meta dt sup { font-size: 14px; color: var(--red-500); margin-left: 2px; }
.hero__meta dd {
  margin: 6px 0 0;
  font-size: 13.5px;
  color: var(--muted);
}

/* Hero 右侧：系统架构示意（浅色毛玻璃） */
.arch {
  position: relative;
  padding: 30px;
  border: 1px solid rgba(26, 38, 48, .1);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .55);
  backdrop-filter: blur(10px);
}
.arch__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
}
.arch__bar i { width: 9px; height: 9px; border-radius: 50%; background: var(--blue-300); }
.arch__bar i:first-child { background: var(--red-500); }
.arch__bar strong {
  margin-left: auto;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .1em;
  color: var(--muted);
  text-transform: uppercase;
}

.arch__layer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 18px;
  border: 1px solid rgba(26, 38, 48, .08);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .4);
  margin-bottom: 10px;
  transition: all .28s var(--ease);
}
.arch__layer:hover {
  border-color: var(--blue-300);
  background: var(--blue-50);
  transform: translateX(4px);
}
.arch__layer b { font-size: 14.5px; font-weight: 500; color: var(--ink); }
.arch__layer small {
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}
.arch__layer--accent { border-left: 2px solid var(--red-600); }

.arch__foot {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px dashed var(--blue-300);
  font-size: 12.5px;
  color: var(--body);
}
.arch__foot svg { width: 15px; height: 15px; color: var(--blue-600); }

/* ---------- 8. 合作单位 logo 墙 ---------- */
.partners { border-bottom: 1px solid var(--line); background: #fff; }
.partners__inner { padding: 56px 0 60px; }
.partners__head {
  text-align: center;
  margin-bottom: 40px;
}
.partners__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--blue-500);
  font-weight: 600;
  text-transform: uppercase;
}
.partners__eyebrow i {
  width: 30px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--blue-300));
}
.partners__eyebrow i:last-child {
  background: linear-gradient(270deg, transparent, var(--blue-300));
}
.partners__head h3 {
  margin-top: 14px;
  font-size: 24px;
  letter-spacing: .02em;
  color: var(--ink);
  font-weight: 600;
  line-height: 1.3;
}
.partners__head p {
  margin-top: 8px;
  font-size: 14px;
  color: var(--muted);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.partners__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.partner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  min-height: 96px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
  text-decoration: none;
}
.partner:hover { border-color: var(--blue-300); box-shadow: var(--shadow-sm); }
.partner__logo {
  max-height: 52px;
  max-width: 92%;
  object-fit: contain;
  filter: none;
  opacity: 1;
  transition: opacity .2s var(--ease), transform .2s var(--ease);
}
.partner__logo--lg { max-height: 57px; }
.partner:hover .partner__logo { transform: scale(1.04); }
.partner__wordmark {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  max-width: 90%;
  padding: 4px 10px;
  border-radius: var(--radius);
  background: var(--bg-alt);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.25;
  text-align: center;
  transition: background .2s var(--ease), color .2s var(--ease);
}
.partner:hover .partner__wordmark {
  background: var(--blue-50);
  color: var(--blue-700);
}

/* ---------- 9. 通用卡片 ---------- */
.card {
  display: block;
  position: relative;
  padding: 36px 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  transition: all .3s var(--ease);
}
.card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 2px;
  background: var(--red-600);
  transition: width .34s var(--ease);
}
.card:hover {
  border-color: var(--blue-100);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.card:hover::before { width: 100%; }

.card__ico {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  background: var(--blue-50);
  color: var(--blue-600);
  margin-bottom: 24px;
  transition: all .3s var(--ease);
}
.card__ico svg { width: 23px; height: 23px; }
.card:hover .card__ico { background: var(--navy-900); color: #fff; }

.card h3 { font-size: 19px; margin-bottom: 12px; }
.card p { font-size: 14.5px; color: var(--body); }

.card__list { margin-top: 20px; display: grid; gap: 9px; }
.card__list li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  color: var(--muted);
}
.card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--red-100);
  border: 1px solid var(--red-500);
}

.card__num {
  position: absolute;
  right: 28px;
  top: 26px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--line);
}

/* 蓝色强调卡片 */
.card--blue {
  background: var(--navy-900);
  border-color: var(--navy-900);
  color: rgba(255, 255, 255, .72);
}
.card--blue h3 { color: #fff; }
.card--blue p { color: rgba(255, 255, 255, .7); }
.card--blue .card__ico { background: rgba(255, 255, 255, .09); color: var(--blue-300); }
.card--blue:hover { border-color: var(--navy-900); }
.card--blue:hover .card__ico { background: var(--red-600); color: #fff; }
.card--blue .card__list li { color: rgba(255, 255, 255, .6); }
.card--blue .card__list li::before { background: rgba(220, 42, 51, .3); }

/* ---------- 10. 左右分栏（图文） ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 76px;
  align-items: center;
}
.split--reverse .split__media { order: 2; }

.split__body h2 { font-size: 32px; line-height: 1.4; letter-spacing: -.02em; }
.split__body > p { margin-top: 20px; font-size: 15.5px; }

.split__points { margin-top: 34px; display: grid; gap: 22px; }
.split__points li { display: flex; gap: 16px; }
.split__points .pt-ico {
  flex: none;
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: var(--red-50);
  color: var(--red-600);
  display: grid;
  place-items: center;
}
.split__points .pt-ico svg { width: 17px; height: 17px; }
.split__points b { display: block; font-size: 15.5px; color: var(--ink); font-weight: 600; margin-bottom: 4px; }
.split__points span { font-size: 14px; color: var(--body); }

.split__media {
  position: relative;
  min-height: 380px;
  border-radius: var(--radius-lg);
  background: var(--blue-50);
  border: 1px solid var(--line);
  overflow: hidden;
  display: grid;
  place-items: center;
}
.split__media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: .7;
}
.split__media > * { position: relative; z-index: 1; }

/* 媒体内的小面板堆叠 */
.stack { width: 78%; display: grid; gap: 12px; }
.stack__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 3px solid var(--blue-500);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  font-size: 14px;
  color: var(--ink);
}
.stack__item b { font-weight: 500; }
.stack__item small { font-size: 12px; color: var(--muted); }
.stack__item--red { border-left-color: var(--red-600); }
.stack__item--navy { border-left-color: var(--navy-900); }

/* 环形指标 */
.ring-wrap { display: grid; place-items: center; gap: 18px; }
.ring { position: relative; width: 172px; height: 172px; }
.ring svg { transform: rotate(-90deg); }
.ring__val {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
}
.ring__val b { font-size: 34px; font-weight: 600; color: var(--navy-900); letter-spacing: -.02em; }
.ring__val span { display: block; font-size: 12.5px; color: var(--muted); letter-spacing: .06em; }

/* ---------- 11. 数据指标 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat {
  padding: 8px 30px;
  border-left: 1px solid rgba(255, 255, 255, .13);
}
.stat:first-child { border-left: 0; padding-left: 0; }
.stat b {
  display: block;
  font-size: 42px;
  font-weight: 600;
  letter-spacing: -.03em;
  line-height: 1.1;
  color: #fff;
}
.stat b i { font-style: normal; font-size: 20px; color: var(--red-500); margin-left: 3px; }
.stat span { display: block; margin-top: 8px; font-size: 14px; color: rgba(255, 255, 255, .6); }

/* 浅色版指标 */
.stats--light .stat { border-left-color: var(--line); }
.stats--light .stat b { color: var(--navy-900); }
.stats--light .stat span { color: var(--muted); }

/* ---------- 12. 流程时间线 ---------- */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 8px; }
.flow__item {
  position: relative;
  padding: 0 28px 0 0;
}
.flow__item::after {
  content: "";
  position: absolute;
  right: 12px;
  top: 25px;
  width: calc(100% - 60px);
  height: 1px;
  background: var(--line);
}
.flow__item:last-child::after { display: none; }
.flow__dot {
  width: 50px;
  height: 50px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #fff;
  display: grid;
  place-items: center;
  font-size: 15px;
  font-weight: 600;
  color: var(--blue-600);
  margin-bottom: 22px;
  position: relative;
  z-index: 1;
}
.flow__item:hover .flow__dot { background: var(--navy-900); border-color: var(--navy-900); color: #fff; }
.flow__item h4 { font-size: 16.5px; margin-bottom: 10px; }
.flow__item p { font-size: 14px; }

/* ---------- 13. 案例列表 ---------- */
.case {
  display: grid;
  grid-template-columns: 66px 1fr auto;
  gap: 26px;
  align-items: center;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
  transition: all .3s var(--ease);
}
.case:first-of-type { border-top: 1px solid var(--line); }
.case:hover { padding-left: 14px; background: var(--blue-50); }
.case__idx {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--blue-500);
}
.case h4 { font-size: 18px; margin-bottom: 8px; }
.case p { font-size: 14px; }
.case__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.case__tags span {
  font-size: 12px;
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: #fff;
}
.case__arrow {
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  color: var(--blue-600);
  background: #fff;
  transition: all .28s var(--ease);
}
.case__arrow svg { width: 16px; height: 16px; }
.case:hover .case__arrow { background: var(--red-600); border-color: var(--red-600); color: #fff; }

/* ---------- 13b. 案例卡片（带截图） ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }

.case-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  overflow: hidden;
  transition: all .3s var(--ease);
}
.case-card:hover {
  border-color: var(--blue-100);
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
}

.case-card__pic {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: linear-gradient(160deg, var(--blue-50), #E8EFF9);
  border-bottom: 1px solid var(--line);
}
.case-card__pic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform .5s var(--ease);
}
.case-card:hover .case-card__pic img { transform: scale(1.045); }

.case-card__cat {
  position: absolute;
  left: 14px;
  top: 14px;
  z-index: 2;
  height: 26px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: rgba(44, 74, 86, .82);
  backdrop-filter: blur(6px);
  color: #fff;
  font-size: 12px;
  letter-spacing: .04em;
}
.case-card__body { padding: 24px 26px 28px; flex: 1; display: flex; flex-direction: column; }
.case-card h3 { font-size: 17px; margin-bottom: 10px; line-height: 1.5; }
.case-card p { font-size: 14px; color: var(--body); flex: 1; }
.case-card__meta {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.case-card__meta span {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  color: var(--muted);
}

/* 案例分类筛选标签 */
.filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 34px;
}
.filter button {
  height: 38px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--body);
  font-size: 14px;
  cursor: pointer;
  transition: all .22s var(--ease);
}
.filter button:hover { border-color: var(--blue-500); color: var(--blue-600); }
.filter button.is-active {
  background: var(--navy-900);
  border-color: var(--navy-900);
  color: #fff;
}

/* ---------- 14. 内页 Banner ---------- */
.page-hero {
  position: relative;
  overflow: hidden;
  background: var(--navy-900);
  padding: 78px 0 74px;
  color: #fff;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .04) 1px, transparent 1px);
  background-size: 62px 62px;
  mask-image: radial-gradient(ellipse 80% 100% at 70% 50%, #000, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 100% at 70% 50%, #000, transparent 75%);
}
.page-hero::after {
  content: "";
  position: absolute;
  left: -120px;
  bottom: -220px;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200, 32, 42, .28), transparent 68%);
}
.page-hero__inner { position: relative; z-index: 2; max-width: 760px; }
.page-hero h1 {
  color: #fff;
  font-size: 42px;
  letter-spacing: -.025em;
  line-height: 1.3;
}
.page-hero p {
  margin-top: 20px;
  font-size: 16.5px;
  line-height: 1.85;
  color: rgba(255, 255, 255, .72);
}

.crumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: rgba(255, 255, 255, .5);
  margin-bottom: 26px;
}
.crumb a:hover { color: #fff; }
.crumb em { font-style: normal; color: var(--red-500); }
.crumb i { opacity: .4; }

/* ---------- 15. 关于页：历程 ---------- */
.timeline { position: relative; padding-left: 34px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line);
}
.tl-item { position: relative; padding-bottom: 42px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 7px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--blue-500);
}
.tl-item:first-child::before { border-color: var(--red-600); box-shadow: 0 0 0 4px var(--red-50); }
.tl-year {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--blue-600);
  margin-bottom: 8px;
}
.tl-item h4 { font-size: 17px; margin-bottom: 8px; }
.tl-item p { font-size: 14.5px; }

/* 价值观 */
.value {
  padding: 34px 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  transition: all .3s var(--ease);
}
.value:hover { border-color: var(--blue-100); box-shadow: var(--shadow-md); transform: translateY(-3px); }
.value b { display: block; font-size: 17px; color: var(--ink); margin-bottom: 10px; }
.value em {
  display: block;
  font-style: normal;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--red-600);
  margin-bottom: 16px;
}
.value p { font-size: 14.5px; }

/* ---------- 16. 服务页：详细条目 ---------- */
.svc {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
}
.svc__body { padding: 46px; }
.svc__body h3 { font-size: 23px; margin-bottom: 18px; }
.svc__body > p { font-size: 15px; }
.svc__body h5 {
  font-size: 13px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 30px 0 16px;
  font-weight: 600;
}
.svc__side {
  padding: 46px;
  background: var(--blue-50);
  border-left: 1px solid var(--line);
}
.svc__side ul { display: grid; gap: 14px; }
.svc__side li {
  display: flex;
  gap: 12px;
  font-size: 14.5px;
  color: var(--ink);
}
.svc__side li svg { width: 16px; height: 16px; flex: none; margin-top: 5px; color: var(--red-600); }

.chip-row { display: flex; flex-wrap: wrap; gap: 9px; }
.chip {
  font-size: 13px;
  padding: 5px 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--body);
  transition: all .22s var(--ease);
}
.chip:hover { border-color: var(--blue-500); color: var(--blue-600); }

/* ---------- 17. 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 60px;
  align-items: start;
}

.info {
  display: flex;
  gap: 18px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}
.info-list > .info:first-child { padding-top: 0; }
.info__ico {
  flex: none;
  width: 42px;
  height: 42px;
  margin-top: 2px;
  border-radius: var(--radius);
  background: var(--blue-50);
  color: var(--blue-600);
  display: grid;
  place-items: center;
}
.info__ico svg { width: 19px; height: 19px; }
.info__label {
  display: block;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--muted);
  margin-bottom: 7px;
}
.info__val {
  font-size: 16px;
  color: var(--ink);
  font-weight: 500;
  line-height: 1.6;
  word-break: break-all;
}
.info__val a { color: var(--ink); }
.info__val a:hover { color: var(--red-600); }
.info__val small {
  display: block;
  font-size: 13px;
  font-weight: 400;
  color: var(--muted);
  margin-top: 4px;
  word-break: normal;
}

/* 表单 */
.form-card {
  padding: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.form-card h3 { font-size: 21px; margin-bottom: 8px; }
.form-card > p { font-size: 14px; color: var(--muted); margin-bottom: 32px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { margin-bottom: 20px; }
.field label {
  display: block;
  font-size: 13.5px;
  color: var(--ink);
  font-weight: 500;
  margin-bottom: 9px;
}
.field label i { font-style: normal; color: var(--red-600); margin-left: 3px; }
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  font-size: 14.5px;
  color: var(--ink);
  outline: none;
  transition: all .2s var(--ease);
}
.field textarea { min-height: 118px; resize: vertical; line-height: 1.7; }
.field input::placeholder,
.field textarea::placeholder { color: #A9B3C2; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(37, 99, 201, .1);
}
.field.has-error input,
.field.has-error textarea { border-color: var(--red-500); }
.field .err {
  display: none;
  margin-top: 7px;
  font-size: 12.5px;
  color: var(--red-600);
}
.field.has-error .err { display: block; }

.form-note {
  margin-top: 18px;
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.7;
}
.form-ok {
  display: none;
  margin-top: 20px;
  padding: 15px 18px;
  border: 1px solid var(--blue-100);
  border-left: 3px solid var(--blue-500);
  border-radius: var(--radius);
  background: var(--blue-50);
  font-size: 14px;
  color: var(--navy-800);
}
.form-ok.is-show { display: block; }

/* FAQ */
.faq { border-top: 1px solid var(--line); }
.faq__item { border-bottom: 1px solid var(--line); }
.faq__q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 0;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-size: 16.5px;
  font-weight: 500;
  color: var(--ink);
}
.faq__q i {
  flex: none;
  width: 26px;
  height: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  font-style: normal;
  font-size: 15px;
  color: var(--blue-600);
  transition: all .25s var(--ease);
}
.faq__item.is-open .faq__q i { background: var(--red-600); border-color: var(--red-600); color: #fff; transform: rotate(45deg); }
.faq__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s var(--ease);
}
.faq__a p { padding: 0 0 26px; font-size: 14.5px; max-width: 820px; }

/* ---------- 18. CTA 条 ---------- */
.cta {
  position: relative;
  overflow: hidden;
  background: linear-gradient(115deg, var(--navy-900) 0%, var(--blue-700) 58%, var(--blue-600) 100%);
  color: #fff;
  padding: 76px 0;
}
.cta::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -120px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(220, 42, 51, .35), transparent 66%);
}
.cta__inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
}
.cta h2 { color: #fff; font-size: 31px; letter-spacing: -.02em; }
.cta p { margin-top: 14px; font-size: 15.5px; color: rgba(255, 255, 255, .72); max-width: 560px; }
.cta__actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 19. 页脚 ---------- */
.site-footer {
  background: var(--navy-900);
  color: rgba(255, 255, 255, .6);
  padding: 66px 0 0;
  font-size: 14px;
}
.footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 52px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.footer__brand .brand__mark { background: #fff; }
.footer__brand .brand__logo { height: 40px; filter: drop-shadow(0 2px 8px rgba(224, 58, 31, .35)); }
.footer__brand .brand__mark span { color: var(--navy-900); }
.footer__brand .brand__name { color: #fff; }
.footer__brand .brand__sub { color: rgba(255, 255, 255, .45); }
.footer__brand p { margin-top: 22px; font-size: 13.5px; line-height: 1.9; max-width: 340px; color: rgba(255, 255, 255, .55); }

.footer__col h5 {
  color: #fff;
  font-size: 14.5px;
  margin-bottom: 20px;
  font-weight: 600;
}
.footer__col ul { display: grid; gap: 12px; }
.footer__col a { font-size: 13.5px; color: rgba(255, 255, 255, .6); }
.footer__col a:hover { color: #fff; }
.footer__col li.with-dot { position: relative; padding-left: 0; }

.footer__contact li {
  display: flex;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.7;
}
.footer__contact svg { width: 15px; height: 15px; flex: none; margin-top: 5px; color: var(--red-500); }

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding: 26px 0 30px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, .42);
}
.footer__bottom a:hover { color: #fff; }
.footer__bottom nav { display: flex; gap: 24px; flex-wrap: wrap; }

/* ---------- 20. 滚动动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-d="1"] { transition-delay: .08s; }
.reveal[data-d="2"] { transition-delay: .16s; }
.reveal[data-d="3"] { transition-delay: .24s; }
.reveal[data-d="4"] { transition-delay: .32s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- 21. 响应式 ---------- */
@media (max-width: 1080px) {
  .hero__inner { grid-template-columns: 1fr; gap: 56px; padding: 84px 0 92px; }
  .hero h1 { font-size: 30px; }
  .split { gap: 48px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(2, 1fr); row-gap: 44px; }
  .flow__item::after { display: none; }
  .footer__top { grid-template-columns: 1fr 1fr; gap: 40px; }
  .svc { grid-template-columns: 1fr; }
  .svc__side { border-left: 0; border-top: 1px solid var(--line); }
}

@media (max-width: 860px) {
  .section { padding: 72px 0; }
  .wrap { padding: 0 22px; }

  .nav__menu, .nav__tel { display: none; }
  .nav__toggle { display: grid; }

  .nav__menu {
    position: absolute;
    left: 0;
    right: 0;
    top: 74px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    padding: 8px 22px 22px;
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s var(--ease), padding .35s var(--ease);
  }
  .nav__menu.is-open { display: flex; max-height: 340px; }
  .nav__menu a {
    padding: 15px 0;
    border-bottom: 1px solid var(--line-2);
    font-size: 15.5px;
  }
  .nav__menu a::after { display: none; }

  .hero h1 { font-size: 25px; }
  .hero h1::after { width: 76px; margin-top: 12px; }
  .hero h1 em::after { height: 2px; bottom: -3px; }
  .hero__desc { font-size: 15.5px; }
  .hero__meta { gap: 22px 34px; }
  .hero__meta dt { font-size: 23px; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .filter { gap: 8px; }
  .filter button { height: 34px; padding: 0 15px; font-size: 13px; }
  .brand__logo { height: 30px; }
  .sec-head h2 { font-size: 26px; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split--reverse .split__media { order: 0; }
  .split__body h2 { font-size: 25px; }
  .split__media { min-height: 300px; }

  .stats { grid-template-columns: repeat(2, 1fr); gap: 34px 0; }
  .stat { padding: 0 20px; }
  .stat:nth-child(odd) { border-left: 0; padding-left: 0; }
  .stat b { font-size: 32px; }

  .flow { grid-template-columns: 1fr; }
  .case { grid-template-columns: 1fr auto; gap: 16px; }
  .case__idx { display: none; }

  .page-hero { padding: 56px 0 52px; }
  .page-hero h1 { font-size: 30px; }
  .page-hero p { font-size: 15px; }

  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .form-card { padding: 28px 22px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .svc__body, .svc__side { padding: 30px 24px; }

  .cta__inner { flex-direction: column; align-items: flex-start; gap: 30px; }
  .cta h2 { font-size: 24px; }

  .footer__top { grid-template-columns: 1fr; gap: 36px; }
  .footer__bottom { flex-direction: column; align-items: flex-start; gap: 14px; }

  .partners__grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .partner { min-height: 88px; padding: 16px 14px; gap: 0; }
  .partner__logo { max-height: 42px; }
  .partner__logo--lg { max-height: 46px; }
  .partner__wordmark { min-height: 32px; font-size: 12px; }
}

@media (max-width: 420px) {
  .partners__grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 18px; letter-spacing: 0; }
  .btn { width: 100%; }
  .hero__cta { flex-direction: column; }
  .cta__actions { width: 100%; flex-direction: column; }
}

/* ---------- 22. 打印 ---------- */
@media print {
  .site-header, .site-footer, .cta, .nav__toggle { display: none; }
  body { font-size: 12pt; }
  .hero, .page-hero { background: #fff !important; color: #000 !important; }
}