/* =========================================================
   闫宝龙 全域网络营销 — 主样式
   ========================================================= */

/* ---------- 0. 设计变量 ---------- */
:root {
  --bg: #0b0b0f;
  --bg-2: #11111a;
  --card: #15151b;
  --card-2: #1b1b23;
  --line: #23232c;
  --line-2: #2e2e38;
  --ink: #f6f2ea;
  --ink-soft: #c9c5bc;
  --ink-mute: #8c8a82;
  --ink-grey: #5b5b66;
  --red: #c0392b;
  --red-2: #a33024;
  --gold: #d4a857;
  --gold-2: #b58e45;
  --green: #2ea66b;

  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --sans:
    "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;

  --shadow-1:
    0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-2:
    0 1px 0 rgba(255, 255, 255, 0.06) inset, 0 14px 40px rgba(0, 0, 0, 0.55);
  --shadow-gold:
    0 0 0 1px rgba(212, 168, 87, 0.35), 0 18px 50px rgba(212, 168, 87, 0.18);

  --container: 1240px;
  --container-narrow: 960px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 1. 基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s var(--ease);
}
a:hover {
  color: var(--gold);
}
button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}
ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.25;
  color: var(--ink);
}
p {
  margin: 0;
}

::selection {
  background: var(--red);
  color: #fff;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--gold);
  color: #000;
  padding: 8px 14px;
  z-index: 999;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
}

/* ---------- 2. 顶部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  padding: 14px 0;
  background: linear-gradient(
    180deg,
    rgba(11, 11, 15, 0.85),
    rgba(11, 11, 15, 0.55)
  );
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid transparent;
  transition:
    padding 0.35s var(--ease),
    background 0.35s var(--ease),
    border-color 0.35s var(--ease);
}
.site-header.is-scrolled {
  padding: 8px 0;
  background: rgba(11, 11, 15, 0.88);
  border-bottom-color: var(--line);
}
.nav-wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-family: var(--serif);
  white-space: nowrap;
}
.brand:hover {
  color: var(--ink);
}
.brand__logo {
  display: inline-flex;
  align-items: flex-start;
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.02em;
}
.brand__r {
  font-size: 10px;
  line-height: 1;
  margin-left: 2px;
  margin-top: 4px;
  color: var(--gold);
  font-family: var(--sans);
}
.brand__divider {
  color: var(--ink-grey);
  font-weight: 300;
}
.brand__sub {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--ink-soft);
  letter-spacing: 0.15em;
  font-weight: 400;
}

.primary-nav {
  flex: 1;
}
.primary-nav ul {
  display: flex;
  gap: 4px;
  justify-content: center;
}
.primary-nav a {
  display: inline-block; padding: 8px 14px;
  font-size: 14.5px; color: var(--ink-soft);
  position: relative;
  font-weight: 500;
  white-space: nowrap;
}
.primary-nav a::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}
.primary-nav a:hover {
  color: var(--ink);
}
.primary-nav a:hover::after {
  transform: scaleX(1);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--red);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  border-radius: var(--r-sm);
  letter-spacing: 0.04em;
  transition:
    background 0.25s var(--ease),
    transform 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}
.nav-cta:hover {
  background: var(--red-2);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(192, 57, 43, 0.35);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  position: relative;
}
.nav-toggle span {
  display: block;
  position: absolute;
  left: 8px;
  right: 8px;
  height: 2px;
  background: var(--ink);
  transition:
    transform 0.3s var(--ease),
    opacity 0.3s var(--ease);
}
.nav-toggle span:nth-child(1) {
  top: 12px;
}
.nav-toggle span:nth-child(2) {
  top: 19px;
}
.nav-toggle span:nth-child(3) {
  top: 26px;
}
.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);
}

/* ---------- 3. 通用容器 ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: 110px 0;
  position: relative;
}
.section--alt {
  background: var(--bg-2);
}
.section::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
  width: 80px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.6;
}

.section-head {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 64px;
}
.section-head--left {
  text-align: left;
  margin-left: 0;
}
.eyebrow {
  display: inline-block;
  font-family: var(--sans);
  font-size: 12.5px;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 16px;
  position: relative;
}
.eyebrow::before,
.eyebrow::after {
  content: "";
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--gold);
  vertical-align: middle;
  margin: 0 14px;
  opacity: 0.5;
}
.section-title {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: 0.01em;
  margin: 0 0 18px;
}
.section-sub {
  color: var(--ink-soft);
  font-size: 16px;
}

/* ---------- 4. Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px 24px 120px;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(
    ellipse at center,
    #000 30%,
    transparent 80%
  );
}
.hero__blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.55;
}
.hero__blob--1 {
  width: 560px;
  height: 560px;
  top: -160px;
  right: -120px;
  background: radial-gradient(circle, var(--red), transparent 60%);
}
.hero__blob--2 {
  width: 460px;
  height: 460px;
  bottom: -200px;
  left: -120px;
  background: radial-gradient(circle, var(--gold), transparent 60%);
  opacity: 0.35;
}
.hero__noise {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.05 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  opacity: 0.9;
  mix-blend-mode: overlay;
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
  text-align: center;
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-size: 12.5px;
  letter-spacing: 0.25em;
  color: var(--ink-soft);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.02);
  margin: 0 0 28px;
  opacity: 0;
  transform: translateY(10px);
  animation: fadeUp 0.9s var(--ease) 0.1s forwards;
}
.hero__eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 10px var(--gold);
}

.hero__title {
  font-size: clamp(40px, 6.2vw, 76px);
  line-height: 1.1;
  font-weight: 700;
  margin: 0 0 22px;
  letter-spacing: 0.005em;
}
.hero__line {
  display: block;
  opacity: 0;
  transform: translateY(28px);
  animation: fadeUp 1s var(--ease) forwards;
}
.hero__line:nth-child(1) {
  animation-delay: 0.25s;
}
.hero__line:nth-child(2) {
  animation-delay: 0.4s;
}
.hero__line--accent {
  color: var(--gold);
  font-style: italic;
  position: relative;
}
.hero__line--accent::after {
  content: "";
  display: block;
  width: 80px;
  height: 2px;
  margin: 18px auto 0;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.hero__sub {
  color: var(--ink-soft);
  font-size: 17px;
  max-width: 720px;
  margin: 0 auto 40px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 1s var(--ease) 0.55s forwards;
}

.hero__cta {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-bottom: 72px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 1s var(--ease) 0.7s forwards;
}

.hero__metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 880px;
  margin: 0 auto;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 1s var(--ease) 0.9s forwards;
}
.hero__metrics li {
  border-top: 1px solid var(--line);
  padding-top: 18px;
}
.hero__metrics b {
  display: block;
  font-family: var(--serif);
  font-size: 38px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.01em;
  background: linear-gradient(180deg, var(--ink) 0%, var(--gold) 120%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero__metrics span {
  color: var(--ink-mute);
  font-size: 13px;
  letter-spacing: 0.12em;
}

.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--ink-mute);
  font-size: 11px;
  letter-spacing: 0.35em;
  z-index: 1;
}
.mouse {
  width: 22px;
  height: 36px;
  border: 1px solid var(--ink-mute);
  border-radius: 12px;
  position: relative;
}
.mouse span {
  position: absolute;
  left: 50%;
  top: 8px;
  width: 3px;
  height: 7px;
  border-radius: 2px;
  background: var(--gold);
  transform: translateX(-50%);
  animation: scrollDot 1.6s var(--ease) infinite;
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--r-sm);
  letter-spacing: 0.04em;
  transition:
    transform 0.25s var(--ease),
    box-shadow 0.25s var(--ease),
    background 0.25s var(--ease),
    color 0.25s var(--ease),
    border-color 0.25s var(--ease);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--red);
  color: #fff;
  box-shadow: 0 10px 24px rgba(192, 57, 43, 0.35);
}
.btn--primary:hover {
  background: var(--red-2);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(192, 57, 43, 0.45);
}
.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-2);
}
.btn--ghost:hover {
  color: var(--gold);
  border-color: var(--gold);
  transform: translateY(-2px);
}

/* ---------- 6. 网格 & 卡片 ---------- */
.grid {
  display: grid;
  gap: 24px;
}
.grid--services {
  grid-template-columns: repeat(3, 1fr);
}
.grid--more {
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}
.grid--cases {
  grid-template-columns: repeat(3, 1fr);
}

.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 32px 28px 30px;
  transition:
    transform 0.35s var(--ease),
    border-color 0.35s var(--ease),
    box-shadow 0.35s var(--ease);
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    600px 200px at 0% 0%,
    rgba(212, 168, 87, 0.1),
    transparent 60%
  );
  opacity: 0;
  transition: opacity 0.35s var(--ease);
  pointer-events: none;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
  box-shadow: var(--shadow-gold);
}
.card:hover::before {
  opacity: 1;
}

.card--service {
  display: flex;
  flex-direction: column;
}
.card__num {
  position: absolute;
  right: 22px;
  top: 18px;
  font-family: var(--serif);
  font-size: 56px;
  font-weight: 700;
  line-height: 1;
  color: var(--red);
  opacity: 0.22;
  transition:
    opacity 0.35s var(--ease),
    transform 0.35s var(--ease);
  letter-spacing: -0.02em;
}
.card--service:hover .card__num {
  opacity: 0.45;
  transform: translateY(-2px);
}
.card__icon {
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-2);
  border-radius: var(--r-sm);
  color: var(--gold);
  margin-bottom: 22px;
  transition:
    background 0.35s var(--ease),
    color 0.35s var(--ease),
    border-color 0.35s var(--ease);
}
.card__icon svg {
  width: 22px;
  height: 22px;
}
.card--service:hover .card__icon {
  background: var(--gold);
  color: var(--bg);
  border-color: var(--gold);
}
.card--service h3 {
  font-family: var(--serif);
  font-size: 22px;
  margin: 0 0 10px;
}
.card--service p {
  color: var(--ink-soft);
  font-size: 14.5px;
  flex: 1;
}
.card__link {
  margin-top: 22px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  color: var(--gold);
  font-weight: 500;
  letter-spacing: 0.12em;
}
.card__link::after {
  content: "↗";
  transition: transform 0.3s var(--ease);
}
.card--service:hover .card__link::after { transform: translate(2px, -2px); }

/* 服务卡 - 核心优势徽章 + AI 平台标签 */
.card--service { overflow: visible; }
.card--feature {
  border-color: rgba(212, 168, 87, 0.4);
  background:
    linear-gradient(180deg, rgba(212, 168, 87, 0.08), transparent 60%),
    var(--card);
  box-shadow: 0 0 0 1px rgba(212, 168, 87, 0.2), 0 18px 50px rgba(212, 168, 87, 0.12);
}
.card--feature::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, var(--gold), transparent 30%, transparent 70%, var(--red));
  z-index: -1;
  opacity: 0.35;
  pointer-events: none;
}
.card__badge {
  position: absolute;
  right: 22px;
  top: 80px;
  padding: 3px 10px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--bg);
  background: linear-gradient(135deg, var(--gold), #efcf86);
  border-radius: 999px;
  font-weight: 700;
  box-shadow: 0 6px 18px rgba(212, 168, 87, 0.4);
}
.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 14px 0 18px;
}
.card__tags li {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  padding: 4px 10px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.02);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.card--service:hover .card__tags li { color: var(--ink); border-color: rgba(212, 168, 87, 0.35); }

/* 导航热标 */
.primary-nav a.is-hot {
  color: var(--gold);
  position: relative;
}
.primary-nav a.is-hot::before {
  content: "HOT";
  position: absolute;
  top: -4px;
  right: 0;
  font-size: 9px;
  letter-spacing: 0.15em;
  color: var(--red);
  font-weight: 700;
  background: rgba(192, 57, 43, 0.12);
  padding: 1px 4px;
  border-radius: 3px;
}

/* GEO 特色板块 */
.section--geo {
  background:
    radial-gradient(800px 400px at 90% 10%, rgba(212, 168, 87, 0.10), transparent 60%),
    radial-gradient(700px 400px at 10% 90%, rgba(192, 57, 43, 0.10), transparent 60%),
    var(--bg);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section--geo::before { display: none; }
.geo {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 64px;
  align-items: center;
}
.geo .section-title { text-align: left; margin: 0 0 22px; }
.geo__lead {
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.85;
  margin-bottom: 32px;
}
.geo__lead b {
  color: var(--gold);
  font-weight: 600;
}
.geo__list {
  display: grid;
  gap: 14px;
  margin-bottom: 32px;
}
.geo__list li {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line);
}
.geo__list b {
  font-family: var(--serif);
  color: var(--gold);
  font-size: 15px;
  letter-spacing: 0.05em;
}
.geo__list span {
  color: var(--ink-soft);
  font-size: 14.5px;
  line-height: 1.75;
}
.geo__cta { display: flex; flex-wrap: wrap; gap: 12px; }

.geo__panel {
  position: relative;
  display: grid;
  gap: 18px;
}
.geo__chat {
  background: linear-gradient(180deg, #14141c, #0e0e14);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
  position: relative;
}
.geo__chat::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(400px 200px at 50% 0%, rgba(212, 168, 87, 0.18), transparent 60%);
  pointer-events: none;
}
.geo__chat-head {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  color: var(--ink-mute);
  letter-spacing: 0.15em;
}
.geo__chat-head em { font-style: normal; margin-left: 8px; }
.geo__chat-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--line-2);
}
.geo__chat-dot:nth-child(1) { background: #ff5f56; }
.geo__chat-dot:nth-child(2) { background: #ffbd2e; }
.geo__chat-dot:nth-child(3) { background: #27c93f; }
.geo__chat-body {
  padding: 22px;
  display: grid;
  gap: 16px;
  position: relative;
}
.geo__q,
.geo__a {
  border-radius: var(--r-md);
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.75;
  border: 1px solid var(--line);
}
.geo__q {
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink-soft);
}
.geo__a {
  background: linear-gradient(180deg, rgba(212, 168, 87, 0.1), rgba(192, 57, 43, 0.06));
  border-color: rgba(212, 168, 87, 0.3);
  color: var(--ink);
}
.geo__q span,
.geo__a span {
  display: block;
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--ink-mute);
  margin-bottom: 6px;
  text-transform: uppercase;
}
.geo__a p { color: var(--ink); }
.geo__a mark {
  background: rgba(212, 168, 87, 0.2);
  color: var(--gold);
  padding: 0 4px;
  border-radius: 3px;
  font-weight: 600;
}
.geo__chat-foot {
  padding: 12px 18px;
  border-top: 1px dashed var(--line);
  color: var(--gold);
  font-size: 12.5px;
  letter-spacing: 0.2em;
  text-align: center;
}
.geo__platforms {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.geo__platforms li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}
.geo__platforms li:hover {
  border-color: var(--gold);
  background: rgba(212, 168, 87, 0.06);
}
.geo__platforms b {
  font-family: var(--serif);
  font-size: 15px;
  color: var(--ink);
  letter-spacing: 0.02em;
}
.geo__platforms span {
  font-size: 11.5px;
  color: var(--ink-mute);
  letter-spacing: 0.1em;
}

/* 更多服务 */
.more-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  color: var(--ink-soft);
  font-size: 14px;
  transition:
    transform 0.25s var(--ease),
    border-color 0.25s var(--ease),
    background 0.25s var(--ease),
    color 0.25s var(--ease);
  position: relative;
  overflow: hidden;
}
.more-card::before {
  content: "↗";
  position: absolute;
  right: 12px;
  top: 12px;
  color: var(--ink-grey);
  font-size: 13px;
  transition:
    color 0.25s var(--ease),
    transform 0.25s var(--ease);
}
.more-card:hover {
  border-color: var(--gold);
  background: var(--card-2);
  color: var(--ink);
  transform: translateY(-2px);
}
.more-card:hover::before {
  color: var(--gold);
  transform: translate(2px, -2px);
}
.more-card b {
  font-family: var(--serif);
  font-size: 16px;
  color: var(--ink);
  font-weight: 600;
  letter-spacing: 0.02em;
}
.more-card small {
  color: var(--ink-mute);
  font-size: 12px;
}
.more-hint {
  margin-top: 24px;
  text-align: center;
  color: var(--ink-mute);
  font-size: 12.5px;
  letter-spacing: 0.12em;
}

/* ---------- 7. 关于 ---------- */
.about {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 64px;
  align-items: center;
}
.about__photo {
  position: relative;
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 4/5;
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-2);
}
.about__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: contrast(1.05) saturate(0.95);
}
.about__photo figcaption {
  position: absolute;
  left: 22px;
  bottom: 22px;
  color: #fff;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.6);
}
.about__photo figcaption span {
  display: block;
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.about__photo figcaption em {
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.25em;
  color: var(--gold);
  text-transform: uppercase;
}
.about__seal {
  position: absolute;
  right: 22px;
  top: 22px;
  width: 56px;
  height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--red);
  color: #fff;
  font-family: var(--serif);
  font-weight: 700;
  border-radius: 50%;
  font-size: 14px;
  letter-spacing: 0.12em;
  box-shadow: 0 6px 18px rgba(192, 57, 43, 0.45);
}
.about__lead {
  font-family: var(--serif);
  font-size: 21px;
  line-height: 1.6;
  color: var(--ink);
  margin-bottom: 28px;
  position: relative;
  padding-left: 18px;
  border-left: 2px solid var(--gold);
}
/* 关于 - 标签条 */
.about__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 32px;
}
.about__tag {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  font-size: 13.5px;
  letter-spacing: 0.04em;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  border-radius: 999px;
  position: relative;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease);
}
.about__tag::before {
  content: "#";
  color: var(--ink-mute);
  margin-right: 4px;
  font-weight: 600;
}
.about__tag:hover {
  transform: translateY(-1px);
  border-color: rgba(212, 168, 87, 0.4);
  color: var(--gold);
}
.about__tag--lead {
  color: #1a1a22;
  background: linear-gradient(135deg, var(--gold), #efcf86);
  border-color: transparent;
  font-weight: 600;
  box-shadow: 0 6px 18px rgba(212, 168, 87, 0.3);
}
.about__tag--lead::before { color: rgba(0, 0, 0, 0.4); }
.about__tag--lecturer {
  color: var(--ink);
  background: linear-gradient(135deg, rgba(192, 57, 43, 0.16), rgba(212, 168, 87, 0.1));
  border-color: rgba(192, 57, 43, 0.35);
}
.about__tag--lecturer::before { color: var(--red); }

.about__points {
  display: grid;
  gap: 18px;
  margin: 0 0 36px;
  padding: 0;
  list-style: none;
}
.about__points li {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line);
}
.about__points b {
  font-family: var(--serif);
  font-size: 15px;
  color: var(--gold);
  letter-spacing: 0.08em;
}
.about__points span {
  color: var(--ink-soft);
  font-size: 14.5px;
}

.about__quote {
  position: relative;
  padding: 30px 30px 26px 60px;
  background: linear-gradient(
    135deg,
    rgba(192, 57, 43, 0.1),
    rgba(212, 168, 87, 0.06)
  );
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink);
}
.about__quote .quote-mark {
  position: absolute;
  left: 22px;
  top: 12px;
  font-family: var(--serif);
  font-size: 56px;
  line-height: 1;
  color: var(--gold);
  font-style: italic;
}
.about__quote footer {
  margin-top: 14px;
  font-size: 13px;
  color: var(--gold);
  letter-spacing: 0.2em;
  font-style: normal;
}

/* ---------- 8. 流程 ---------- */
.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: p;
  position: relative;
}
.process::before {
  content: "";
  position: absolute;
  left: 6%;
  right: 6%;
  top: 36px;
  height: 1px;
  background: repeating-linear-gradient(
    90deg,
    var(--line-2) 0 6px,
    transparent 6px 12px
  );
  z-index: 0;
}
.process li {
  position: relative;
  z-index: 1;
  padding: 0 12px;
}
.process__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 1px solid var(--gold);
  color: var(--gold);
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 22px;
  position: relative;
}
.process__num::after {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1px solid transparent;
  transition: border-color 0.35s var(--ease);
}
.process li:hover .process__num::after {
  border-color: rgba(212, 168, 87, 0.35);
}
.process h3 {
  font-family: var(--serif);
  font-size: 22px;
  margin: 0 0 8px;
}
.process p {
  color: var(--ink-soft);
  font-size: 14.5px;
}

/* ---------- 9. 案例 ---------- */
.case {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 30px 28px 28px;
  transition:
    transform 0.35s var(--ease),
    border-color 0.35s var(--ease);
  position: relative;
  overflow: hidden;
}
.case::before {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 160px;
  height: 160px;
  background: radial-gradient(circle, rgba(192, 57, 43, 0.18), transparent 60%);
}
.case:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
}
.case__tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 12px;
  letter-spacing: 0.15em;
  color: var(--gold);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  margin-bottom: 18px;
}
.case h3 {
  font-family: var(--serif);
  font-size: 22px;
  margin: 0 0 10px;
}
.case > p {
  color: var(--ink-soft);
  font-size: 14.5px;
  margin-bottom: 18px;
}
.case ul {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.case li {
  font-size: 12.5px;
  color: var(--ink-mute);
  padding: 8px 10px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  text-align: center;
}

/* ---------- 10. FAQ ---------- */
.faq {
  display: grid;
  gap: 14px;
}
.faq details {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 0;
  transition:
    border-color 0.25s var(--ease),
    background 0.25s var(--ease);
}
.faq details[open] {
  border-color: var(--gold);
  background: var(--card-2);
}
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 22px 56px 22px 26px;
  position: relative;
  font-family: var(--serif);
  font-size: 17px;
  color: var(--ink);
  letter-spacing: 0.01em;
  user-select: none;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::after {
  content: "";
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 14px;
  background:
    linear-gradient(var(--gold), var(--gold)) center / 100% 1.5px no-repeat,
    linear-gradient(var(--gold), var(--gold)) center / 1.5px 100% no-repeat;
  transition: transform 0.3s var(--ease);
}
.faq details[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
  background: linear-gradient(var(--gold), var(--gold)) center / 100% 1.5px
    no-repeat;
}
.faq details > p {
  padding: 0 26px 24px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
  border-top: 1px dashed var(--line);
  margin-top: 0;
  padding-top: 16px;
}

/* ---------- 11. 联系 ---------- */
.contact {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 48px;
  align-items: start;
}
.contact__cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.contact__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 26px 26px 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition:
    border-color 0.25s var(--ease),
    transform 0.25s var(--ease),
    background 0.25s var(--ease);
  color: var(--ink);
}
a.contact__item:hover {
  border-color: var(--gold);
  transform: translateY(-2px);
  color: var(--ink);
}
.contact__label {
  font-size: 12px;
  letter-spacing: 0.25em;
  color: var(--ink-mute);
  text-transform: uppercase;
}
.contact__value {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.01em;
}
.contact__hint {
  font-size: 12px;
  color: var(--ink-mute);
}
.contact__qr {
  margin: 0;
  text-align: center;
  background: #fff;
  border-radius: var(--r-md);
  padding: 14px;
  box-shadow: var(--shadow-2);
}
.contact__qr img {
  width: 100%;
  height: auto;
  border-radius: 4px;
}
.contact__qr figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--ink);
  letter-spacing: 0.08em;
  font-family: var(--serif);
}

/* ---------- 12. 底部 ---------- */
.site-footer {
  background: #07070b;
  border-top: 1px solid var(--line);
  padding: 64px 0 32px;
  color: var(--ink-soft);
  font-size: 14px;
}
.footer__row {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 40px;
}
.footer__brand p {
  color: var(--ink-mute);
  margin-top: 12px;
  max-width: 280px;
}
.footer__nav h4 {
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.25em;
  color: var(--gold);
  text-transform: uppercase;
  margin: 0 0 18px;
  font-weight: 500;
}
.footer__nav li {
  margin-bottom: 10px;
}
.footer__nav a {
  color: var(--ink-soft);
  font-size: 14px;
}
.footer__nav a:hover {
  color: var(--gold);
}

.footer__divider {
  border: 0;
  height: 1px;
  background: var(--line);
  margin: 40px 0 24px;
}
.footer__legal {
  text-align: center;
}
.footer__legal p {
  margin: 6px 0;
  color: var(--ink-mute);
  font-size: 13px;
}
.footer__legal a {
  color: var(--ink-soft);
}
.footer__legal a:hover {
  color: var(--gold);
}
.dot-sep {
  color: var(--ink-grey);
  margin: 0 8px;
}
.footer__contact {
  font-family: var(--serif);
  color: var(--ink-mute) !important;
}

/* ---------- 13. 浮动电话 ---------- */
.float-phone {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 54px;
  height: 54px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--red);
  color: #fff;
  border-radius: 50%;
  box-shadow: 0 12px 28px rgba(192, 57, 43, 0.4);
  z-index: 90;
  animation: floatPulse 2.4s ease-in-out infinite;
  transition:
    transform 0.25s var(--ease),
    background 0.25s var(--ease);
}
.float-phone:hover {
  transform: scale(1.08);
  color: #fff;
  background: var(--red-2);
}

/* ---------- 14. 滚动出现 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.9s var(--ease),
    transform 0.9s var(--ease);
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}
.reveal[data-delay="1"].is-in {
  transition-delay: 0.08s;
}
.reveal[data-delay="2"].is-in {
  transition-delay: 0.16s;
}
.reveal[data-delay="3"].is-in {
  transition-delay: 0.24s;
}
.reveal[data-delay="4"].is-in {
  transition-delay: 0.32s;
}
.reveal[data-delay="5"].is-in {
  transition-delay: 0.4s;
}

/* ---------- 15. 动画 ---------- */
@keyframes fadeUp {
  to {
    opacity: 1;
    transform: none;
  }
}
@keyframes scrollDot {
  0% {
    transform: translate(-50%, 0);
    opacity: 1;
  }
  60% {
    transform: translate(-50%, 12px);
    opacity: 0;
  }
  100% {
    transform: translate(-50%, 0);
    opacity: 0;
  }
}
@keyframes floatPulse {
  0%,
  100% {
    box-shadow: 0 12px 28px rgba(192, 57, 43, 0.4);
  }
  50% {
    box-shadow:
      0 12px 36px rgba(192, 57, 43, 0.7),
      0 0 0 8px rgba(192, 57, 43, 0.12);
  }
}

/* ---------- 16. 响应式 ---------- */
@media (max-width: 1100px) {
  .grid--services {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid--more {
    grid-template-columns: repeat(4, 1fr);
  }
  .footer__row {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 860px) {
  .nav-wrap {
    justify-content: space-between;
  }
  .primary-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    width: 100%;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    background: #0b0b0f;
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    z-index: 99;
    transition:
      transform 0.35s var(--ease),
      opacity 0.35s var(--ease);
    border-top: 1px solid var(--line);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  }
  .primary-nav.is-open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }
  .primary-nav ul {
    flex-direction: column;
    padding: 20px;
  }
  .primary-nav a {
    display: block;
    padding: 16px 8px;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
    color: var(--ink);
    transition: color 0.25s var(--ease), background 0.25s var(--ease);
  }
  .primary-nav a:hover, .primary-nav a:active {
    color: var(--gold);
    background: rgba(212, 168, 87, 0.08);
  }
  .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .section { padding: 80px 0; }
  .section-title { font-size: 30px; }
  .section-head { margin-bottom: 44px; }

  .geo { grid-template-columns: 1fr; gap: 40px; }
  .geo__list li { grid-template-columns: 1fr; gap: 6px; }
  .geo__platforms { grid-template-columns: repeat(2, 1fr); }
  .primary-nav a.is-hot::before { display: none; }
  .card__badge { top: 70px; }

  .grid--services {
    grid-template-columns: 1fr;
  }
  .grid--more {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid--cases {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding: 130px 20px 100px;
  }
  .hero__metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
  .hero__metrics b {
    font-size: 30px;
  }

  .about {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .about__lead {
    font-size: 18px;
  }
  .about__points li {
    grid-template-columns: 90px 1fr;
    gap: 12px;
  }

  .process {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
  .process::before {
    display: none;
  }

  .contact {
    grid-template-columns: 1fr;
  }
  .contact__cards {
    grid-template-columns: 1fr;
  }
  .contact__qr {
    max-width: 240px;
    margin: 0 auto;
  }

  .footer__row {
    grid-template-columns: 1fr 1fr;
  }
  .case ul {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (max-width: 520px) {
  .footer__row {
    grid-template-columns: 1fr;
  }
  .grid--more {
    grid-template-columns: 1fr 1fr;
  }
  .case ul {
    grid-template-columns: 1fr;
  }
  .process {
    grid-template-columns: 1fr;
  }
  .nav-cta {
    display: none;
  }
  .brand__sub {
    display: none;
  }
  .float-phone {
    width: 48px;
    height: 48px;
    right: 14px;
    bottom: 14px;
  }
}

/* 减弱动效 */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  html {
    scroll-behavior: auto;
  }
}