/*!
 * 云鼎数智宣传站 - 青铜炉冶主题样式
 * Copyright (c) 2026 湖北云鼎数智科技有限公司. All rights reserved.
 * 作者：湖北云鼎数智科技有限公司
 * 版本：V1.0.0
 * 配色：深墨黑底 + 古铜金 + 熔炉橙 + 铜绿
 * ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  --bg-0: #0E0B08;          /* 主背景（带暖调墨黑） */
  --bg-1: #14100B;          /* section 交替背景 */
  --bg-card: #1C1812;       /* 卡片背景 */
  --gold: #B08D4E;          /* 古铜金 主强调（调沉，更具出土青铜质感） */
  --gold-bright: #D9B574;   /* 古铜金高光 */
  --gold-soft: #7A5E34;     /* 古铜金暗部 */
  --patina: #4A7A6E;        /* 铜绿/铜锈（青铜标志色，呼应科技青） */
  --patina-bright: #6FA89A; /* 铜绿亮 */
  --ember: #E0673A;         /* 熔炉橙 次强调 */
  --ember-bright: #F08A4B;  /* 熔炉橙亮 */
  --text: #F5EFE6;          /* 主文字 */
  --text-mute: #A89888;     /* 次文字 */
  --text-dim: #6B5E4D;      /* 弱文字 */
  --line: rgba(176, 141, 78, 0.20); /* 古铜金分隔线 */
  --grad-fire: linear-gradient(120deg, #B08D4E 0%, #E0673A 100%);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(224, 103, 58, 0.25);
  --maxw: 1200px;
  --nav-h: 72px;
  --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-en: Georgia, "Times New Roman", serif;
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif; /* 标题：思源宋体（铸造铭文感） */
  --font-num: "Cinzel", Georgia, serif;  /* 编号/数字：碑铭体 */
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-cn);
  background: var(--bg-0);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; display: block; }
ul { list-style: none; }

/* ---------- 通用布局 ---------- */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
section { padding: 110px 0; position: relative; }
section.alt { background: var(--bg-1); }

/* 章节标题块 */
.section-head { text-align: center; margin-bottom: 60px; }
.section-head .eyebrow {
  font-family: var(--font-num);
  font-size: 0.8rem;
  letter-spacing: 4px;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 10px;
  display: block;
}
.section-head .no {
  font-family: var(--font-num);
  color: var(--ember);
  font-size: 1rem;
  letter-spacing: 2px;
}
.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: 4px;
  margin-bottom: 16px;
}
.section-head .sub {
  color: var(--text-mute);
  max-width: 680px;
  margin: 0 auto;
  font-size: 1.02rem;
}
/* 古铜金装饰短横线 */
.divider { width: 56px; height: 3px; background: var(--grad-fire); border-radius: 2px; margin: 20px auto 0; }

/* ---------- 渐入动效 ---------- */
.reveal { opacity: 0; transform: translateY(36px); transition: opacity 0.8s cubic-bezier(.2,.7,.3,1), transform 0.8s cubic-bezier(.2,.7,.3,1); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.1s; }
.reveal[data-delay="2"] { transition-delay: 0.2s; }
.reveal[data-delay="3"] { transition-delay: 0.3s; }
.reveal[data-delay="4"] { transition-delay: 0.4s; }

/* ============================================================
   导航栏
   ============================================================ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center;
  transition: background 0.4s, box-shadow 0.4s, backdrop-filter 0.4s;
  background: transparent;
}
.nav.scrolled {
  background: rgba(14, 11, 8, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--line);
}
.nav .container { width: 100%; display: flex; align-items: center; justify-content: space-between; }
.nav-logo img { height: 48px; }
.nav-links { display: flex; gap: 8px; align-items: center; }
.nav-links a {
  font-size: 0.95rem; color: var(--text-mute);
  position: relative; padding: 8px 16px;
  transition: color 0.25s;
  border-radius: 6px;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 2px; background: var(--grad-fire);
  transition: width 0.3s;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a.active::after, .nav-links a:hover::after { width: 100%; }
.nav-cta {
  padding: 9px 22px; border: 1px solid var(--gold); border-radius: 999px;
  color: var(--gold); font-size: 0.9rem; transition: all 0.25s;
}
.nav-cta:hover { background: var(--gold); color: var(--bg-0); }
/* 汉堡按钮 */
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; background: none; border: none; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text); transition: 0.3s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端遮罩菜单 */
.nav-mobile {
  position: fixed; inset: 0; z-index: 99; background: rgba(14, 11, 8, 0.97);
  backdrop-filter: blur(8px); display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 28px;
  opacity: 0; pointer-events: none; transition: opacity 0.35s;
}
.nav-mobile.open { opacity: 1; pointer-events: auto; }
.nav-mobile a { font-size: 1.4rem; color: var(--text); }

/* ============================================================
   Hero 首屏
   ============================================================ */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  text-align: center; position: relative; overflow: hidden;
  padding-top: var(--nav-h);
}
/* 炉火光晕背景 */
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 100%, rgba(224,103,58,0.22), transparent 70%),
    radial-gradient(ellipse 60% 40% at 50% 30%, rgba(201,160,99,0.12), transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; left: 50%; bottom: -30%;
  width: 120%; height: 60%; transform: translateX(-50%);
  background: radial-gradient(ellipse at center, rgba(240,138,75,0.18), transparent 60%);
  animation: breathe 6s ease-in-out infinite;
  pointer-events: none;
}
@keyframes breathe { 0%,100% { opacity: 0.6; transform: translateX(-50%) scale(1); } 50% { opacity: 1; transform: translateX(-50%) scale(1.08); } }

/* 鼎水印（青铜器背景锚点） */
.hero-ding {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -42%);
  width: clamp(280px, 38vw, 520px);
  opacity: 0.06; z-index: 1; pointer-events: none;
  animation: ding-float 12s ease-in-out infinite;
}
@keyframes ding-float { 0%,100% { transform: translate(-50%, -42%); } 50% { transform: translate(-50%, -45%); } }

.hero-inner { position: relative; z-index: 2; max-width: 920px; padding: 0 24px; }
.hero-tag {
  font-family: var(--font-num); letter-spacing: 5px; font-size: 0.78rem;
  color: var(--gold); margin-bottom: 26px; display: inline-block;
  padding: 7px 20px; border: 1px solid var(--line); border-radius: 999px;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 6vw, 4rem); font-weight: 900; letter-spacing: 4px;
  line-height: 1.3; margin-bottom: 22px;
}
.hero h1 .grad { background: var(--grad-fire); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero .slogan {
  font-size: clamp(0.95rem, 2vw, 1.15rem); color: var(--text-mute);
  max-width: 700px; margin: 0 auto 14px; line-height: 1.9;
}
.hero .slogan .sep { color: var(--ember); margin: 0 8px; }
.hero .sub { color: var(--text-dim); font-size: 0.95rem; margin-bottom: 38px; }
.hero-ctas { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; margin-bottom: 64px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 34px; border-radius: 999px; font-size: 1rem; font-weight: 600;
  cursor: pointer; transition: all 0.28s; border: none;
}
.btn-primary { background: var(--grad-fire); color: #1a1208; box-shadow: var(--shadow-glow); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 0 50px rgba(224,103,58,0.45); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--gold-soft); }
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); transform: translateY(-3px); }

/* Hero 数据计数器 */
.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; max-width: 760px; margin: 0 auto; }
.hero-stat .num {
  font-family: var(--font-num); font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 700;
  background: var(--grad-fire); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  line-height: 1.1;
}
.hero-stat .lbl { font-size: 0.82rem; color: var(--text-mute); margin-top: 6px; letter-spacing: 1px; }

/* 滚动提示 */
.scroll-hint { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); color: var(--text-dim); font-size: 0.78rem; letter-spacing: 2px; z-index: 2; }
.scroll-hint .dot { display: block; width: 1px; height: 30px; margin: 8px auto 0; background: linear-gradient(var(--gold), transparent); animation: scrolldown 1.8s ease-in-out infinite; }
@keyframes scrolldown { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } 51% { transform: scaleY(1); transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }

/* ============================================================
   通用卡片
   ============================================================ */
.card {
  background: linear-gradient(160deg, #221C14 0%, var(--bg-card) 60%, #181410 100%);
  border: 1px solid var(--gold-soft);
  border-top-color: rgba(217,181,116,0.25); /* 顶部高光边（金属反光） */
  border-radius: 14px;
  padding: 36px 30px; transition: all 0.35s; position: relative; overflow: hidden;
  box-shadow: inset 0 1px 0 rgba(217,181,116,0.08), inset 0 -1px 0 rgba(0,0,0,0.4), 0 4px 16px rgba(0,0,0,0.3);
}
.card:hover {
  transform: translateY(-6px);
  border-color: var(--gold);
  box-shadow: inset 0 1px 0 rgba(217,181,116,0.15), 0 12px 36px rgba(0,0,0,0.5), 0 0 24px rgba(176,141,78,0.15);
}
.card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--grad-fire); transform: scaleX(0); transform-origin: left; transition: transform 0.4s; }
.card:hover::before { transform: scaleX(1); }
.card-icon { width: 52px; height: 52px; border-radius: 12px; background: linear-gradient(135deg, rgba(176,141,78,0.15), rgba(74,122,110,0.1)); border: 1px solid var(--line); display: flex; align-items: center; justify-content: center; margin-bottom: 22px; }
.card-icon svg { width: 28px; height: 28px; stroke: var(--gold-bright); }
.card h3 { font-size: 1.25rem; margin-bottom: 8px; letter-spacing: 1px; }
.card .card-sub { color: var(--ember); font-size: 0.82rem; letter-spacing: 1px; margin-bottom: 16px; }
.card p { color: var(--text-mute); font-size: 0.96rem; }

.badge { display: inline-block; font-size: 0.7rem; padding: 3px 10px; border-radius: 999px; letter-spacing: 1px; margin-left: 8px; vertical-align: middle; }
.badge.now { background: rgba(224,103,58,0.15); color: var(--ember-bright); border: 1px solid rgba(224,103,58,0.3); }
.badge.core { background: rgba(176,141,78,0.15); color: var(--gold-bright); border: 1px solid rgba(176,141,78,0.35); }

/* ============================================================
   关于我们
   ============================================================ */
.about-body { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.about-text h3 { font-size: clamp(1.4rem,3vw,1.9rem); margin-bottom: 24px; line-height: 1.5; }
.about-text p { color: var(--text-mute); margin-bottom: 18px; font-size: 1rem; }
.about-text p .hl { color: var(--gold); }
.creed-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.creed { background: var(--bg-card); border: 1px solid var(--line); border-left: 3px solid var(--ember); border-radius: 10px; padding: 26px 24px; }
.creed .t { color: var(--gold); font-size: 0.85rem; letter-spacing: 2px; margin-bottom: 10px; }
.creed .c { font-size: 0.98rem; line-height: 1.8; }

/* ============================================================
   能力三卡
   ============================================================ */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.cap-card .no { font-family: var(--font-num); font-size: 2.4rem; color: var(--gold-soft); font-weight: 700; line-height: 1; }
.cap-card ul { margin-top: 18px; }
.cap-card li { padding: 9px 0 9px 14px; border-bottom: 1px solid rgba(176,141,78,0.12); color: var(--text-mute); font-size: 0.95rem; position: relative; }
.cap-card li::before { content: ""; position: absolute; left: 0; top: 50%; width: 6px; height: 1px; background: var(--gold-soft); transform: translateY(-50%); }
.cap-card li:last-child { border-bottom: none; }
.cap-card li b { color: var(--text); font-weight: 600; }
.cap-chain { text-align: center; max-width: 800px; margin: 50px auto 0; color: var(--text-mute); font-size: 1rem; padding-top: 36px; border-top: 1px solid var(--line); }

/* ============================================================
   优势四卡
   ============================================================ */
.why-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.why-card { text-align: left; padding: 40px 32px; display: flex; flex-direction: column; align-items: flex-start; }
.why-card .why-mark { font-family: var(--font-num); font-size: 1.8rem; font-weight: 700; color: transparent; -webkit-text-stroke: 1px var(--patina); margin-bottom: 18px; line-height: 1; }
.why-card h3 { font-family: var(--font-display); font-size: 1.3rem; margin-bottom: 14px; letter-spacing: 1px; }
.why-card p { color: var(--text-mute); font-size: 0.95rem; line-height: 1.85; }

/* ============================================================
   案例区
   ============================================================ */
.case-challenge { max-width: 820px; margin: 0 auto 50px; text-align: center; }
.case-challenge .tag { color: var(--ember); font-size: 0.85rem; letter-spacing: 2px; margin-bottom: 14px; }
.case-challenge p { color: var(--text); font-size: 1.1rem; line-height: 1.9; }
.case-steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; margin-bottom: 50px; }
.case-step { padding: 30px; }
.case-step .step-tag { color: var(--gold); font-size: 0.82rem; letter-spacing: 2px; margin-bottom: 10px; }
.case-step h4 { font-size: 1.1rem; margin-bottom: 10px; }
.case-step p { color: var(--text-mute); font-size: 0.92rem; }
.case-result { text-align: center; max-width: 760px; margin: 0 auto 44px; color: var(--text-mute); }
.case-stats { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; max-width: 820px; margin: 0 auto; }
.case-stat {
  text-align: center; padding: 28px 14px;
  background: linear-gradient(180deg, #221C14, var(--bg-card));
  border: 1px solid var(--gold-soft); border-radius: 12px;
  box-shadow: inset 0 1px 0 rgba(217,181,116,0.12), inset 0 -2px 4px rgba(0,0,0,0.4);
}
.case-stat .n {
  font-family: var(--font-num); font-size: clamp(1.6rem,3.5vw,2.2rem); font-weight: 700;
  color: var(--gold-bright);
  text-shadow: 0 1px 0 rgba(0,0,0,0.5), 0 0 12px rgba(217,181,116,0.25);
}
.case-stat .l { font-size: 0.82rem; color: var(--text-mute); margin-top: 6px; }

/* ============================================================
   AI 落地场景
   ============================================================ */
.ai-block { margin-bottom: 50px; }
.ai-block-head { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; }
.ai-block-head .dot { width: 10px; height: 10px; border-radius: 50%; background: linear-gradient(135deg, var(--patina-bright), var(--patina)); flex-shrink: 0; box-shadow: 0 0 8px rgba(74,122,110,0.5); }
.ai-block-head h3 { font-size: 1.3rem; }
.ai-block-head .desc { color: var(--text-mute); font-size: 0.9rem; margin-left: auto; }
.ai-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.ai-item { padding: 26px; }
.ai-item h4 { font-size: 1.05rem; margin-bottom: 10px; color: var(--text); }
.ai-item p { color: var(--text-mute); font-size: 0.9rem; }
.ai-foot { text-align: center; color: var(--text-mute); font-size: 0.95rem; padding-top: 30px; border-top: 1px solid var(--line); max-width: 820px; margin: 0 auto; }
.ai-foot .hl { color: var(--gold); }

/* ============================================================
   服务对象 + 综合服务
   ============================================================ */
.serve-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.serve-card { text-align: center; }
.serve-card h3 { font-size: 1.15rem; margin-bottom: 14px; color: var(--gold); }
.serve-card p { color: var(--text-mute); font-size: 0.95rem; }

/* 综合服务资质网格 */
.qual-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 14px; }
.qual-item {
  background: linear-gradient(180deg, #221C14, var(--bg-card));
  border: 1px solid var(--gold-soft); border-radius: 10px;
  padding: 20px 12px; text-align: center; color: var(--text-mute); font-size: 0.88rem;
  transition: all 0.3s;
  box-shadow: inset 0 1px 0 rgba(217,181,116,0.08);
}
.qual-item:hover { border-color: var(--gold); color: var(--text); transform: translateY(-3px); box-shadow: inset 0 1px 0 rgba(217,181,116,0.15), 0 4px 12px rgba(0,0,0,0.3); }
.qual-note { text-align: center; color: var(--text-dim); font-size: 0.85rem; margin-top: 24px; }

/* ============================================================
   合作邀请
   ============================================================ */
.join-intro { max-width: 760px; margin: 0 auto 50px; text-align: center; color: var(--text-mute); font-size: 1.02rem; }
.join-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-bottom: 44px; }
.join-card { text-align: center; }
.join-card .ico { width: 48px; height: 48px; margin-bottom: 16px; display: flex; align-items: center; justify-content: center; }
.join-card .ico svg { width: 40px; height: 40px; }
.join-card h3 { font-size: 1.2rem; color: var(--gold); margin-bottom: 12px; }
.join-card p { color: var(--text-mute); font-size: 0.95rem; }
.join-cta { text-align: center; }

/* ============================================================
   联系区
   ============================================================ */
.contact-wrap { display: grid; grid-template-columns: 1.2fr 1fr; gap: 50px; align-items: center; }
.contact-info li { display: flex; align-items: flex-start; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.contact-info li:last-child { border-bottom: none; }
.contact-info .k { color: var(--gold); font-size: 0.85rem; letter-spacing: 1px; min-width: 90px; padding-top: 3px; }
.contact-info .v { color: var(--text); font-size: 1.02rem; }
.contact-info .v a { color: var(--text); transition: color 0.25s; }
.contact-info .v a:hover { color: var(--ember-bright); }
.qr-wrap { display: flex; gap: 24px; justify-content: center; }
.qr-box { text-align: center; }
.qr-box img { width: 160px; height: 160px; border-radius: 12px; }
.qr-box .ttl { font-size: 0.85rem; color: var(--text-mute); margin-top: 12px; }
.contact-sig { text-align: center; margin-top: 56px; }
.contact-sig .big { font-family: var(--font-display); font-size: clamp(1.4rem,3vw,1.9rem); font-weight: 900; background: var(--grad-fire); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; letter-spacing: 6px; }
.contact-sig .small { color: var(--text-dim); font-size: 0.85rem; margin-top: 8px; }

/* ============================================================
   Footer
   ============================================================ */
.footer { padding: 40px 0; text-align: center; border-top: 1px solid var(--line); background: var(--bg-1); }
.footer p { color: var(--text-dim); font-size: 0.85rem; line-height: 1.9; }
.footer p .sep { margin: 0 10px; color: var(--text-dim); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .why-grid { grid-template-columns: repeat(2,1fr); }
  .qual-grid { grid-template-columns: repeat(3,1fr); }
}
@media (max-width: 768px) {
  section { padding: 80px 0; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .hero-stats { grid-template-columns: repeat(2,1fr); gap: 30px; }
  .about-body { grid-template-columns: 1fr; gap: 36px; }
  .creed-grid { grid-template-columns: 1fr; }
  .cap-grid, .why-grid, .case-steps, .ai-grid, .serve-grid, .join-grid { grid-template-columns: 1fr; }
  .case-stats { grid-template-columns: repeat(2,1fr); }
  .qual-grid { grid-template-columns: repeat(2,1fr); }
  .contact-wrap { grid-template-columns: 1fr; }
  .ai-block-head { flex-wrap: wrap; }
  .ai-block-head .desc { margin-left: 0; width: 100%; }
  .qr-wrap { flex-wrap: wrap; }
}
@media (max-width: 480px) {
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .qual-grid { grid-template-columns: 1fr 1fr; }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ============================================================
   青铜纹样（雷纹/回纹边条）+ 科技动效
   ============================================================ */

/* 雷纹（回纹）边条 —— 商周青铜器视觉DNA，兼具科技网格感 */
.thunder-border {
  height: 14px; width: 100%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='14' viewBox='0 0 28 14'%3E%3Cpath d='M2 2 H10 V6 H6 V10 H14 V2 H22 V6 H18 V12 H26 V8 H22' fill='none' stroke='%23B08D4E' stroke-width='1' opacity='0.4'/%3E%3C/svg%3E");
  background-repeat: repeat-x;
  background-position: center;
  background-size: 28px 14px;
}
.hero .thunder-border { position: absolute; top: 0; left: 0; right: 0; z-index: 3; opacity: 0.5; }

/* 铜锈/金属颗粒噪点叠加层 —— 打破死黑背景，赋予材质感 */
.patina-noise {
  position: fixed; inset: 0; z-index: -1;
  pointer-events: none; opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.7 0 0 0 0 0.55 0 0 0 0 0.3 0 0 0 0.6 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ============================================================
   科技动效增强（参考 qianggeai.com）
   ============================================================ */

/* Hero 粒子连线 canvas */
.hero-particles {
  position: absolute; top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 1; pointer-events: none;
}

/* 标题分隔线流光 */
.section-head .divider {
  position: relative; overflow: hidden;
}
.section-head .divider::after {
  content: ""; position: absolute; top: 0; left: -40%;
  width: 40%; height: 100%;
  background: linear-gradient(90deg, transparent, #F5EFE6, transparent);
  animation: shimmer 3s ease-in-out infinite;
}
@keyframes shimmer {
  0% { left: -40%; }
  60%, 100% { left: 100%; }
}

/* 卡片光斑跟随（鼠标位置高光） */
.card {
  position: relative;
}
.card::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle 120px at var(--mx, 50%) var(--my, 50%), rgba(201,160,99,0.10), transparent 70%);
  opacity: 0; transition: opacity 0.3s;
  pointer-events: none; border-radius: 14px;
}
.card:hover::after { opacity: 1; }

/* Hero 内容视差过渡 */
.hero-inner { transition: opacity 0.3s ease-out; }

/* 按钮流光（primary 按钮加扫光） */
.btn-primary { position: relative; overflow: hidden; }
.btn-primary::after {
  content: ""; position: absolute; top: 0; left: -60%;
  width: 50%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transform: skewX(-20deg);
  animation: btnshine 4s ease-in-out infinite;
}
@keyframes btnshine {
  0% { left: -60%; }
  50%, 100% { left: 120%; }
}