/* ============================================================
   心海无限 · 企业官网公共样式
   风格：简约大气 / 深墨蓝 × 海蓝渐变 / 大量留白
   ============================================================ */

:root {
  --ink: #0d2137;
  --ink-2: #123356;
  --primary: #1663d9;
  --primary-deep: #0e4bb8;
  --accent: #0fb5a6;
  --grad: linear-gradient(120deg, #1663d9 0%, #0fb5a6 100%);
  --bg: #ffffff;
  --bg-soft: #f4f8fc;
  --line: #e5edf5;
  --text: #2c3e50;
  --muted: #6b7c8f;
  --radius: 16px;
  --shadow-sm: 0 2px 10px rgba(13, 33, 55, 0.06);
  --shadow-md: 0 14px 40px rgba(13, 33, 55, 0.10);
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", -apple-system, "Segoe UI", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img, svg { vertical-align: middle; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

.container { width: min(1180px, 92%); margin: 0 auto; }

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

.sec-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.sec-head--left { margin-left: 0; text-align: left; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 4px;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.eyebrow::before, .eyebrow::after {
  content: "";
  width: 26px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad);
}
.sec-head--left .eyebrow::before { display: none; }

.sec-title {
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.35;
  letter-spacing: 1px;
}
.sec-desc { margin-top: 16px; color: var(--muted); font-size: 16px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 34px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
  cursor: pointer;
  border: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}
.btn--primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 10px 26px rgba(22, 99, 217, 0.32);
}
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 16px 34px rgba(22, 99, 217, 0.42); }
.btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid rgba(13, 33, 55, 0.22);
}
.btn--ghost:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-3px); }
.btn--light { background: rgba(255,255,255,0.14); color: #fff; border: 1.5px solid rgba(255,255,255,0.45); backdrop-filter: blur(6px); }
.btn--light:hover { background: #fff; color: var(--ink); transform: translateY(-3px); }
.btn--sm { padding: 10px 26px; font-size: 14px; }

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.nav.is-scrolled { border-bottom-color: var(--line); box-shadow: var(--shadow-sm); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 82px; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark {
  height: 56px; width: auto; flex: none; display: block;
  object-fit: contain;
}
.brand__mark-wrap { /* 仅用于页脚：白色底板完整展示 logo，尺寸自适应 */
  flex: none; padding: 7px; background: #fff;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
}
.brand__mark-wrap .brand__mark { height: 46px; width: auto; }
.brand__text { display: flex; flex-direction: column; line-height: 1.25; }
.brand__name {
  font-size: 26px; font-weight: 800; letter-spacing: 2.5px; color: var(--ink);
  background: linear-gradient(100deg, #0d2137 0%, #1663d9 55%, #0fb5a6 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.brand__en { font-size: 11px; letter-spacing: 2px; color: var(--muted); text-transform: uppercase; margin-top: 3px; }

.nav__menu { display: flex; align-items: center; gap: 38px; }
.nav__link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  padding: 6px 0;
  transition: color 0.2s ease;
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -2px;
  width: 0;
  height: 3px;
  border-radius: 3px;
  background: var(--grad);
  transform: translateX(-50%);
  transition: width 0.28s ease;
}
.nav__link:hover { color: var(--primary); }
.nav__link:hover::after, .nav__link.is-active::after { width: 100%; }
.nav__link.is-active { color: var(--primary); font-weight: 700; }

.nav__cta { margin-left: 8px; }

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 9px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav__toggle span {
  display: block;
  height: 2.5px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav__toggle.is-open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ---------- Hero（首页） ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(1100px 520px at 82% -10%, rgba(15, 181, 166, 0.14), transparent 60%),
    radial-gradient(900px 480px at 8% 8%, rgba(22, 99, 217, 0.16), transparent 62%),
    linear-gradient(180deg, #f7fafd 0%, #eef4fb 100%);
  padding: 120px 0 150px;
  text-align: center;
}
.hero__deco { position: absolute; inset: 0; pointer-events: none; }
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(22, 99, 217, 0.18);
  box-shadow: var(--shadow-sm);
  font-size: 13.5px;
  color: var(--ink-2);
  letter-spacing: 1px;
  margin-bottom: 30px;
}
.hero__badge i {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(15, 181, 166, 0.18);
}
.hero__title {
  font-size: clamp(38px, 6.2vw, 68px);
  font-weight: 800;
  color: var(--ink);
  line-height: 1.22;
  letter-spacing: 2px;
}
.hero__title .grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__sub {
  max-width: 680px;
  margin: 26px auto 0;
  font-size: clamp(15px, 1.6vw, 17.5px);
  color: var(--muted);
}
.hero__actions { margin-top: 42px; display: flex; justify-content: center; gap: 18px; flex-wrap: wrap; }
.hero__wave { position: absolute; left: 0; right: 0; bottom: -1px; width: 100%; display: block; }

/* ---------- 数据条 ---------- */
.stats { margin-top: -66px; position: relative; z-index: 5; }
.stats__card {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--line);
  overflow: hidden;
}
.stat { padding: 34px 20px; text-align: center; position: relative; }
.stat + .stat::before {
  content: "";
  position: absolute;
  left: 0; top: 26%;
  height: 48%;
  width: 1px;
  background: var(--line);
}
.stat__num {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.1;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-variant-numeric: tabular-nums;
}
.stat__label { margin-top: 8px; font-size: 14.5px; color: var(--muted); letter-spacing: 1px; }

/* ---------- 业务卡片 ---------- */
.grid { display: grid; gap: 24px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

.card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 30px;
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(22, 99, 217, 0.35); }
.card__icon {
  width: 54px; height: 54px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(22, 99, 217, 0.10), rgba(15, 181, 166, 0.12));
  color: var(--primary);
  margin-bottom: 20px;
}
.card__icon svg { width: 26px; height: 26px; }
.card__title { font-size: 18.5px; font-weight: 700; color: var(--ink); margin-bottom: 10px; letter-spacing: 0.5px; }
.card__desc { font-size: 14.5px; color: var(--muted); }
.card__tags { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-size: 12px;
  color: var(--primary-deep);
  background: rgba(22, 99, 217, 0.08);
  border-radius: 6px;
  padding: 3px 10px;
  letter-spacing: 0.5px;
}

/* ---------- 双轨一体化 ---------- */
.dual {
  position: relative;
  background:
    radial-gradient(800px 400px at 12% 0%, rgba(22, 99, 217, 0.35), transparent 60%),
    radial-gradient(800px 400px at 88% 100%, rgba(15, 181, 166, 0.28), transparent 60%),
    linear-gradient(160deg, #0d2137 0%, #123a63 100%);
  color: #fff;
  overflow: hidden;
}
.dual .sec-title { color: #fff; }
.dual .sec-desc { color: rgba(255, 255, 255, 0.72); }
.dual__grid { display: grid; grid-template-columns: 1fr auto 1fr; gap: 28px; align-items: stretch; }
.dual__panel {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  padding: 38px 34px;
  backdrop-filter: blur(8px);
  transition: transform 0.28s ease, background 0.28s ease;
}
.dual__panel:hover { transform: translateY(-6px); background: rgba(255, 255, 255, 0.10); }
.dual__panel h3 { font-size: 21px; font-weight: 700; letter-spacing: 1px; display: flex; align-items: center; gap: 12px; }
.dual__panel .sub { font-size: 12px; letter-spacing: 2.5px; color: rgba(255,255,255,0.55); text-transform: uppercase; display: block; margin-bottom: 6px; }
.dual__panel p { margin-top: 14px; font-size: 14.5px; color: rgba(255, 255, 255, 0.78); }
.dual__panel ul { margin-top: 18px; display: grid; gap: 10px; }
.dual__panel li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 14.5px; color: rgba(255, 255, 255, 0.88);
}
.dual__panel li::before {
  content: "";
  flex: none;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 9px;
  box-shadow: 0 0 0 3px rgba(15, 181, 166, 0.25);
}
.dual__axis { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px; }
.dual__axis .mark { font-size: 44px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.dual__axis .txt { writing-mode: vertical-lr; letter-spacing: 8px; font-size: 13px; color: rgba(255,255,255,0.6); }
.dual__note {
  margin-top: 30px;
  text-align: center;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.82);
  letter-spacing: 1px;
}
.dual__note strong { color: #fff; }

/* ---------- 行业卡 ---------- */
.ind-card { text-align: center; padding: 36px 22px; }
.ind-card .card__icon { margin: 0 auto 18px; }

/* ---------- 优势列表 ---------- */
.adv { display: grid; grid-template-columns: 1fr 1fr; gap: 22px 40px; }
.adv__item {
  display: flex;
  gap: 18px;
  padding: 26px 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 0.28s ease, box-shadow 0.28s ease;
}
.adv__item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.adv__num {
  flex: none;
  font-size: 30px;
  font-weight: 800;
  line-height: 1;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding-top: 4px;
}
.adv__item h4 { font-size: 17px; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
.adv__item p { font-size: 14px; color: var(--muted); }

/* ---------- CTA ---------- */
.cta {
  background:
    radial-gradient(700px 320px at 85% 20%, rgba(15, 181, 166, 0.30), transparent 60%),
    radial-gradient(700px 320px at 10% 90%, rgba(22, 99, 217, 0.35), transparent 60%),
    linear-gradient(150deg, #0d2137, #14406e);
  color: #fff;
  text-align: center;
  padding: 86px 0;
}
.cta h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 800; letter-spacing: 2px; }
.cta p { margin-top: 14px; color: rgba(255, 255, 255, 0.75); }
.cta .btn { margin-top: 34px; }

/* ---------- 子页 Hero ---------- */
.page-hero {
  position: relative;
  background:
    radial-gradient(800px 360px at 85% 0%, rgba(15, 181, 166, 0.28), transparent 62%),
    radial-gradient(700px 340px at 8% 100%, rgba(22, 99, 217, 0.30), transparent 60%),
    linear-gradient(155deg, #0d2137 0%, #133a63 100%);
  color: #fff;
  text-align: center;
  padding: 92px 0 120px;
  overflow: hidden;
}
.page-hero__crumb {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.66);
  letter-spacing: 1px;
  margin-bottom: 22px;
}
.page-hero__crumb a:hover { color: #fff; }
.page-hero h1 { font-size: clamp(30px, 4.4vw, 46px); font-weight: 800; letter-spacing: 3px; }
.page-hero__sub { margin-top: 16px; color: rgba(255, 255, 255, 0.75); font-size: 16px; max-width: 640px; margin-left: auto; margin-right: auto; }
.page-hero .hero__wave { fill: var(--bg); }
.page-hero--soft .hero__wave { fill: var(--bg-soft); }

/* ---------- 关于我们 ---------- */
.about-layout { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center; }
.about-text p { margin-bottom: 16px; color: var(--muted); font-size: 15.5px; }
.about-text p strong { color: var(--ink); }

.journey {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 32px;
  box-shadow: var(--shadow-sm);
}
.journey__title { font-size: 16px; font-weight: 700; color: var(--ink); letter-spacing: 2px; margin-bottom: 22px; }
.journey__item { position: relative; padding-left: 26px; padding-bottom: 24px; }
.journey__item:last-child { padding-bottom: 0; }
.journey__item::before {
  content: "";
  position: absolute;
  left: 5px; top: 8px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 0 4px rgba(22, 99, 217, 0.14);
}
.journey__item:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 9px; top: 22px; bottom: 2px;
  width: 1.5px;
  background: var(--line);
}
.journey__item h4 { font-size: 15.5px; font-weight: 700; color: var(--ink); }
.journey__item p { font-size: 13.5px; color: var(--muted); margin-top: 4px; }

/* 业务板块大卡 */
.board {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 42px 38px;
  transition: transform 0.28s ease, box-shadow 0.28s ease;
}
.board:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.board__head { display: flex; align-items: center; gap: 16px; margin-bottom: 18px; }
.board__icon {
  flex: none;
  width: 58px; height: 58px;
  border-radius: 15px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
}
.board__icon svg { width: 28px; height: 28px; }
.board__icon--blue { background: linear-gradient(135deg, #1663d9, #0e4bb8); box-shadow: 0 10px 22px rgba(22, 99, 217, 0.3); }
.board__icon--teal { background: linear-gradient(135deg, #0fb5a6, #0a8f83); box-shadow: 0 10px 22px rgba(15, 181, 166, 0.3); }
.board__head h3 { font-size: 22px; font-weight: 800; color: var(--ink); letter-spacing: 1px; }
.board__head .sub { font-size: 12px; letter-spacing: 2.5px; color: var(--muted); text-transform: uppercase; }
.board > p { color: var(--muted); font-size: 14.5px; margin-bottom: 20px; }
.board__list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 22px; }
.board__list li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 14.5px; color: var(--ink-2);
  background: var(--bg-soft);
  border-radius: 10px;
  padding: 12px 16px;
}
.board__list li svg { flex: none; width: 17px; height: 17px; margin-top: 4px; color: var(--accent); }

/* 理念 */
.idea-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.idea {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 30px;
  overflow: hidden;
  transition: transform 0.28s ease, box-shadow 0.28s ease;
}
.idea:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.idea::before {
  content: "";
  position: absolute;
  left: 0; top: 0; right: 0;
  height: 4px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}
.idea:hover::before { transform: scaleX(1); }
.idea__num { font-size: 15px; font-weight: 800; color: var(--primary); letter-spacing: 3px; }
.idea h4 { font-size: 19px; font-weight: 700; color: var(--ink); margin: 10px 0 12px; }
.idea p { font-size: 14px; color: var(--muted); }

/* 保障机制 */
.guard-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.guard { text-align: center; padding: 36px 24px; }
.guard .card__icon { margin: 0 auto 18px; width: 60px; height: 60px; border-radius: 50%; }
.guard .card__icon svg { width: 27px; height: 27px; }
.guard h4 { font-size: 17px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.guard p { font-size: 13.8px; color: var(--muted); }

/* ---------- 产品服务 ---------- */
.service-track { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.srv { position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 32px 28px; transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease; }
.srv:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(15, 181, 166, 0.4); }
.srv__no {
  position: absolute;
  right: 24px; top: 22px;
  font-size: 30px;
  font-weight: 800;
  color: rgba(13, 33, 55, 0.07);
  font-variant-numeric: tabular-nums;
}
.srv__icon { width: 50px; height: 50px; border-radius: 13px; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, rgba(22, 99, 217, 0.10), rgba(15, 181, 166, 0.12)); color: var(--primary); margin-bottom: 18px; }
.srv__icon svg { width: 24px; height: 24px; }
.srv h4 { font-size: 17.5px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.srv p { font-size: 14px; color: var(--muted); }

/* 履约模式（步骤） */
.steps { display: grid; gap: 0; margin-top: 8px; }
.steps--4 { grid-template-columns: repeat(4, 1fr); }
.step { position: relative; padding: 0 18px; text-align: center; }
.step__dot {
  width: 64px; height: 64px;
  margin: 0 auto;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800;
  background: var(--grad);
  color: #fff;
  box-shadow: 0 10px 24px rgba(22, 99, 217, 0.26);
  position: relative;
  z-index: 2;
}
.step h4 { margin-top: 18px; font-size: 16.5px; font-weight: 700; color: var(--ink); }
.step p { margin-top: 8px; font-size: 13.5px; color: var(--muted); }
.step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 31px;
  left: calc(50% + 40px);
  width: calc(100% - 80px);
  height: 2px;
  background: repeating-linear-gradient(90deg, rgba(22, 99, 217, 0.35) 0 10px, transparent 10px 18px);
}
.step__tag {
  display: inline-block;
  margin-top: 12px;
  font-size: 12px;
  color: var(--primary-deep);
  background: rgba(22, 99, 217, 0.08);
  padding: 3px 12px;
  border-radius: 6px;
  letter-spacing: 1px;
}

/* 深色履约区 */
.fulfill {
  background:
    radial-gradient(700px 360px at 88% 10%, rgba(15, 181, 166, 0.25), transparent 60%),
    linear-gradient(160deg, #0d2137, #133a63);
  color: #fff;
}
.fulfill .sec-title { color: #fff; }
.fulfill .sec-desc { color: rgba(255, 255, 255, 0.7); }
.fulfill .step__dot { background: rgba(255,255,255,0.08); border: 1.5px solid rgba(255,255,255,0.35); box-shadow: none; }
.fulfill .step h4 { color: #fff; }
.fulfill .step p { color: rgba(255, 255, 255, 0.68); }
.fulfill .step:not(:last-child)::after { background: repeating-linear-gradient(90deg, rgba(255,255,255,0.4) 0 10px, transparent 10px 18px); }
.fulfill .step__tag { color: #7fe3d9; background: rgba(15, 181, 166, 0.16); }
.fulfill__note { margin-top: 44px; text-align: center; color: rgba(255,255,255,0.75); font-size: 14.5px; }

/* 合作流程 */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: flow; }
.flow__item {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform 0.28s ease, box-shadow 0.28s ease;
}
.flow__item:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.flow__item::before {
  counter-increment: flow;
  content: "0" counter(flow);
  font-size: 34px; font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
  display: block;
  margin-bottom: 14px;
}
.flow__item h4 { font-size: 17px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.flow__item p { font-size: 13.8px; color: var(--muted); }

/* ---------- 联系我们 ---------- */
.contact-layout { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 48px; align-items: start; }
.contact-card {
  background:
    radial-gradient(500px 260px at 90% 0%, rgba(15, 181, 166, 0.28), transparent 60%),
    linear-gradient(160deg, #0d2137, #14406e);
  border-radius: 20px;
  color: #fff;
  padding: 44px 40px;
  box-shadow: var(--shadow-md);
}
.contact-card h3 { font-size: 23px; font-weight: 800; letter-spacing: 2px; }
.contact-card > p { margin-top: 10px; color: rgba(255, 255, 255, 0.7); font-size: 14px; }
.contact-card ul { margin-top: 30px; display: grid; gap: 22px; }
.contact-card li { display: flex; gap: 16px; align-items: flex-start; }
.contact-card li .ico {
  flex: none;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.10);
  border: 1px solid rgba(255, 255, 255, 0.18);
  display: flex; align-items: center; justify-content: center;
}
.contact-card li .ico svg { width: 20px; height: 20px; color: #7fe3d9; }
.contact-card li h5 { font-size: 13px; color: rgba(255, 255, 255, 0.6); letter-spacing: 2px; font-weight: 500; }
.contact-card li p { font-size: 15.5px; font-weight: 600; margin-top: 3px; }
.contact-tip {
  margin-top: 30px;
  padding: 18px 20px;
  border-radius: 14px;
  background: rgba(15, 181, 166, 0.12);
  border: 1px solid rgba(127, 227, 217, 0.35);
}
.contact-tip strong {
  display: block;
  font-size: 14px;
  letter-spacing: 1px;
  color: #7fe3d9;
  margin-bottom: 8px;
}
.contact-tip p { font-size: 13.5px; line-height: 1.8; color: rgba(255, 255, 255, 0.78); }

.form { background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 44px 42px; box-shadow: var(--shadow-sm); }
.form h3 { font-size: 21px; font-weight: 800; color: var(--ink); letter-spacing: 1px; }
.form > p { margin-top: 8px; color: var(--muted); font-size: 14px; }
.form__grid { margin-top: 28px; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form__field { display: flex; flex-direction: column; gap: 8px; }
.form__field--full { grid-column: 1 / -1; }
.form__field label { font-size: 13.5px; font-weight: 600; color: var(--ink-2); letter-spacing: 1px; }
.form__field label em { color: #e05a5a; font-style: normal; margin-left: 2px; }
.form__field input, .form__field select, .form__field textarea {
  font-family: var(--font);
  font-size: 14.5px;
  color: var(--text);
  background: var(--bg-soft);
  border: 1.5px solid transparent;
  border-radius: 11px;
  padding: 13px 16px;
  outline: none;
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
}
.form__field textarea { resize: vertical; min-height: 120px; }
.form__field input:focus, .form__field select:focus, .form__field textarea:focus {
  background: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(22, 99, 217, 0.10);
}
.form__actions { margin-top: 28px; display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.form__hint { font-size: 13px; color: var(--muted); }
.form__status {
  display: none;
  margin-top: 22px;
  padding: 14px 18px;
  border-radius: 12px;
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.5;
}
.form__status.is-success {
  display: block;
  background: rgba(15, 181, 166, 0.10);
  border: 1px solid rgba(15, 181, 166, 0.35);
  color: #0a8f83;
}
.form__status.is-error {
  display: block;
  background: rgba(224, 90, 90, 0.08);
  border: 1px solid rgba(224, 90, 90, 0.35);
  color: #c0392b;
}
.form__status.is-loading {
  display: block;
  background: rgba(22, 99, 217, 0.07);
  border: 1px solid rgba(22, 99, 217, 0.25);
  color: #1663d9;
}
.form__status.is-clear { display: none; }

/* ---------- 页脚 ---------- */
.footer { background: #0b1c30; color: rgba(255, 255, 255, 0.72); position: relative; }
.footer::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, #1663d9 0%, #0fb5a6 45%, rgba(15, 181, 166, 0) 95%);
}
.footer__main { display: grid; grid-template-columns: 1.55fr 0.8fr 1fr 1.15fr; gap: 46px; padding: 72px 0 48px; }
.footer .brand__mark-wrap { padding: 8px; border-radius: 13px; }
.footer .brand__mark-wrap .brand__mark { height: 50px; }
.footer .brand__name { color: #fff; background: none; -webkit-text-fill-color: #fff; }
.footer .brand__en { color: rgba(255, 255, 255, 0.45); }
.footer__intro { margin-top: 20px; font-size: 14px; max-width: 380px; }
.footer h5 {
  display: flex; align-items: center; gap: 9px;
  font-size: 15px; color: #fff; letter-spacing: 2px; margin-bottom: 22px; font-weight: 700;
}
.footer h5 svg { flex: none; width: 18px; height: 18px; color: #0fb5a6; }
.footer__links { display: grid; gap: 14px; }
.footer__links a {
  font-size: 14px; transition: color 0.2s ease, padding-left 0.2s ease;
  display: inline-flex; align-items: center; gap: 8px;
}
.footer__links a::before { content: "›"; color: #0fb5a6; font-size: 16px; font-weight: 700; line-height: 1; }
.footer__links a:hover { color: #7fe3d9; padding-left: 6px; }
.footer__biz { display: grid; gap: 14px; font-size: 14px; }
.footer__biz li { display: flex; align-items: center; gap: 10px; }
.footer__biz li::before {
  content: ""; flex: none; width: 6px; height: 6px; border-radius: 2px;
  background: linear-gradient(135deg, #1663d9, #0fb5a6);
}
.footer__plat { margin-top: 24px; }
.footer__plat-label { display: block; font-size: 12px; letter-spacing: 2.5px; color: rgba(255, 255, 255, 0.38); margin-bottom: 12px; }
.footer__plat-row { display: flex; flex-wrap: wrap; gap: 8px; }
.plat-badge {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 6px 14px; border-radius: 999px;
  background: rgba(255, 255, 255, 0.07); border: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 12.5px; color: rgba(255, 255, 255, 0.8);
  transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}
.plat-badge::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: #0fb5a6; }
.plat-badge:hover { background: rgba(127, 227, 217, 0.12); border-color: rgba(127, 227, 217, 0.4); color: #fff; }
.footer__contact { display: grid; gap: 14px; font-size: 14px; }
.footer__contact li { display: flex; gap: 10px; align-items: flex-start; }
.footer__contact svg { flex: none; width: 16px; height: 16px; margin-top: 3px; color: #0fb5a6; }
.footer__safe {
  margin-top: 22px; display: flex; align-items: center; gap: 9px;
  padding: 11px 14px; border-radius: 10px;
  background: rgba(15, 181, 166, 0.10); border: 1px solid rgba(15, 181, 166, 0.28);
  font-size: 12.5px; color: #7fe3d9; letter-spacing: 0.5px;
}
.footer__safe svg { flex: none; width: 17px; height: 17px; }
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.10);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}
.footer__legal { display: flex; flex-direction: column; gap: 5px; }
.footer__icp {
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
  letter-spacing: 0.5px;
  transition: color 0.25s ease;
}
.footer__icp:hover { color: #7fe3d9; }

/* ---------- 回到顶部 ---------- */
.backtop {
  position: fixed;
  right: 26px;
  bottom: 30px;
  width: 46px; height: 46px;
  border-radius: 50%;
  border: none;
  background: var(--grad);
  color: #fff;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 24px rgba(22, 99, 217, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
  z-index: 90;
}
.backtop.is-visible { opacity: 1; visibility: visible; transform: none; }
.backtop:hover { transform: translateY(-4px); }
.backtop svg { width: 20px; height: 20px; }

/* ---------- 渐现动画 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.12s; }
.reveal[data-delay="2"] { transition-delay: 0.24s; }
.reveal[data-delay="3"] { transition-delay: 0.36s; }
.reveal[data-delay="4"] { transition-delay: 0.48s; }

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

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid--4, .guard-grid, .flow { grid-template-columns: repeat(2, 1fr); }
  .dual__grid { grid-template-columns: 1fr; }
  .dual__axis { display: none; }
  .about-layout, .contact-layout { grid-template-columns: 1fr; }
  .footer__main { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .nav__inner { height: 74px; }
  .brand__mark { height: 46px; }
  .footer .brand__mark-wrap { padding: 6px; border-radius: 11px; }
  .footer .brand__mark-wrap .brand__mark { height: 40px; }
  .brand__name { font-size: 22px; letter-spacing: 2px; }
  .brand__en { font-size: 9px; letter-spacing: 1px; }
  .nav__menu {
    position: fixed;
    top: 74px;
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    padding: 10px 0 20px;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }
  .nav__menu.is-open { transform: none; opacity: 1; visibility: visible; }
  .nav__menu .nav__link { width: 100%; text-align: center; padding: 14px 0; }
  .nav__cta { display: none; }
  .nav__toggle { display: flex; }

  .hero { padding: 80px 0 120px; }
  .stats__card { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3)::before { display: none; }
  .grid--3, .grid--2, .service-track, .idea-grid, .steps--4, .form__grid, .adv, .board__list { grid-template-columns: 1fr; }
  .steps--4 { gap: 34px; }
  .step:not(:last-child)::after { display: none; }
  .guard-grid, .flow { grid-template-columns: 1fr; }
  .footer__main { grid-template-columns: 1fr; gap: 36px; padding: 56px 0 36px; }
  .form, .contact-card, .board { padding: 32px 24px; }
  .hero__actions .btn { width: 100%; max-width: 320px; }
}