/* ==========================================================================
   喜缘坊 xyfmall.com — 高端黑金 · 编辑排版风格
   Design tokens（源自 ui-ux-pro-max 设计系统）
   ========================================================================== */

:root {
  /* 色彩令牌 */
  --color-primary: #1C1917;
  --color-primary-soft: #292524;
  --color-on-primary: #FFFFFF;
  --color-accent: #A16207;          /* 金 · 用于浅色背景大字/装饰 */
  --color-accent-ink: #7C5204;      /* 金 · 小号文字（浅背景，≥4.5:1） */
  --color-accent-bright: #D4A72C;   /* 金 · 深色背景上的亮金 */
  --color-background: #FAFAF9;
  --color-tint: #F4F2EE;
  --color-foreground: #0C0A09;
  --color-card: #FFFFFF;
  --color-muted-foreground: #57534E;
  --color-border: #E5E2DD;
  --color-border-strong: #D6D3D1;
  --color-destructive: #B42318;
  --color-ring: #A16207;

  /* 字体 */
  --font-display: "Cormorant", "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-body: "Montserrat", -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Segoe UI", sans-serif;

  /* 字号阶梯 */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: clamp(1.25rem, 1rem + 1vw, 1.5rem);
  --fs-h3: clamp(1.15rem, 1rem + 0.6vw, 1.35rem);
  --fs-h2: clamp(1.9rem, 1.4rem + 2.2vw, 2.75rem);
  --fs-hero: clamp(2.6rem, 1.6rem + 5.4vw, 5.25rem);

  /* 间距（4/8 体系） */
  --space-1: 4px;  --space-2: 8px;  --space-3: 16px;
  --space-4: 24px; --space-5: 32px; --space-6: 48px;
  --space-7: 64px; --space-8: 96px;

  /* 其他 */
  --radius-sm: 3px;
  --radius-md: 6px;
  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --shadow-card: 0 1px 2px rgba(28, 25, 23, 0.05), 0 10px 28px -14px rgba(28, 25, 23, 0.16);
  --shadow-lift: 0 2px 4px rgba(28, 25, 23, 0.06), 0 22px 44px -18px rgba(28, 25, 23, 0.26);
  --header-h: 76px;
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.75;
  color: var(--color-foreground);
  background: var(--color-background);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; line-height: 1.25; margin: 0; }

p { margin: 0; }

a { color: inherit; }

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

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

::selection { background: rgba(161, 98, 7, 0.22); }

:focus-visible {
  outline: 2px solid var(--color-ring);
  outline-offset: 3px;
  border-radius: 2px;
}

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

.icon {
  width: 24px; height: 24px;
  fill: none; stroke: currentColor;
  stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
  flex: none;
}

.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 200;
  padding: 10px 18px;
  background: var(--color-primary); color: #fff;
  font-size: var(--fs-sm); text-decoration: none;
  transition: top 0.2s var(--ease-out);
}
.skip-link:focus-visible { top: 12px; }

/* ========== 通用组件 ========== */
.kicker {
  display: inline-flex; align-items: center; gap: 14px;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--color-accent-ink);
}
.kicker::before {
  content: ""; width: 28px; height: 1px; background: currentColor; opacity: 0.7;
}
.kicker-dark { color: var(--color-accent-bright); }

.section-title {
  font-size: var(--fs-h2);
  letter-spacing: 0.06em;
  margin-top: var(--space-3);
  color: var(--color-primary);
}
.text-gold { color: var(--color-accent); }

.ornament {
  display: flex; align-items: center; justify-content: center;
  gap: 10px; margin-top: var(--space-4);
}
.ornament i { width: 56px; height: 1px; background: var(--color-border-strong); }
.ornament b { width: 7px; height: 7px; background: var(--color-accent); transform: rotate(45deg); }
.ornament-dark i { background: rgba(255, 255, 255, 0.22); }

.section-head {
  text-align: center;
  max-width: 620px;
  margin: 0 auto var(--space-7);
}
.section-lede {
  margin-top: var(--space-4);
  color: var(--color-muted-foreground);
  font-size: var(--fs-lg);
}

.section { padding-block: clamp(72px, 10vw, 128px); }
.section-tint { background: var(--color-tint); }
.section-dark {
  background:
    radial-gradient(52% 68% at 82% 8%, rgba(212, 167, 44, 0.09), transparent 62%),
    linear-gradient(180deg, #171412 0%, var(--color-primary) 58%, #171412 100%);
  color: #E7E5E4;
}
.section-dark .section-title { color: #fff; }
.section-dark .section-lede { color: #A8A29E; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 12px 30px;
  font-family: var(--font-body);
  font-size: var(--fs-sm); font-weight: 600;
  letter-spacing: 0.14em;
  text-decoration: none; cursor: pointer;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  transition: background-color 0.25s var(--ease-out), color 0.25s var(--ease-out),
              border-color 0.25s var(--ease-out), transform 0.25s var(--ease-out);
}
.btn:active { transform: translateY(1px); }
.btn .icon { width: 18px; height: 18px; }

.btn-gold { background: var(--color-accent-bright); color: #201A08; border-color: var(--color-accent-bright); }
.btn-gold:hover { background: #E3BC45; border-color: #E3BC45; }

.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: #000; }

.btn-ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.45); }
.btn-ghost:hover { border-color: var(--color-accent-bright); color: var(--color-accent-bright); }

.btn-block { width: 100%; }

.text-link {
  color: var(--color-accent-ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(161, 98, 7, 0.4);
  transition: border-color 0.2s var(--ease-out);
}
.text-link:hover { border-bottom-color: var(--color-accent-ink); }

/* ========== 顶部导航 ========== */
.site-header {
  position: fixed; inset: 0 0 auto; z-index: 100;
  height: var(--header-h);
  display: flex; align-items: center;
  transition: background-color 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out), height 0.3s var(--ease-out);
}
.site-header.is-scrolled {
  height: 64px;
  background: rgba(250, 250, 249, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--color-border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); }

.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-logo {
  height: 46px; width: auto; flex: none;
  display: block;
  transition: height 0.3s var(--ease-out);
}
.site-header.is-scrolled .brand-logo { height: 40px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong {
  font-family: var(--font-display);
  font-size: 1.3rem; font-weight: 700; letter-spacing: 0.22em;
  color: #fff;
}
.brand-text small {
  font-size: 0.62rem; letter-spacing: 0.3em;
  color: rgba(255, 255, 255, 0.62); margin-top: 3px;
}
.site-header.is-scrolled .brand-text strong { color: var(--color-primary); }
.site-header.is-scrolled .brand-text small { color: var(--color-muted-foreground); }

.site-nav { display: flex; align-items: center; gap: var(--space-5); }
.site-nav ul { display: flex; gap: clamp(18px, 2.4vw, 34px); }
.nav-link {
  position: relative;
  display: inline-flex; align-items: center; min-height: 44px;
  font-size: var(--fs-sm); font-weight: 500; letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.85); text-decoration: none;
  transition: color 0.2s var(--ease-out);
}
.nav-link::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 8px;
  height: 1px; background: var(--color-accent-bright);
  transition: right 0.28s var(--ease-out);
}
.nav-link:hover, .nav-link.is-active { color: #fff; }
.nav-link:hover::after, .nav-link.is-active::after { right: 0; }
.site-header.is-scrolled .nav-link { color: var(--color-secondary); }
.site-header.is-scrolled .nav-link:hover,
.site-header.is-scrolled .nav-link.is-active { color: var(--color-primary); }
.site-header.is-scrolled .nav-link::after { background: var(--color-accent); }
.nav-cta { min-height: 42px; padding: 9px 22px; }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  background: transparent; border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: var(--radius-sm); color: #fff; cursor: pointer;
}
.nav-toggle .icon { width: 22px; height: 22px; }
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }
.site-header.is-scrolled .nav-toggle { border-color: var(--color-border-strong); color: var(--color-primary); }

/* ========== Hero 首屏 ========== */
.hero {
  position: relative;
  min-height: min(100svh, 960px);
  display: flex; align-items: center;
  padding: calc(var(--header-h) + 56px) 0 96px;
  color: #fff;
  background:
    radial-gradient(70% 90% at 78% 6%, rgba(212, 167, 44, 0.13), transparent 58%),
    linear-gradient(158deg, #211D1A 0%, var(--color-primary) 46%, #12100F 100%);
  overflow: clip;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-arcs { position: absolute; inset: 0; width: 100%; height: 100%; color: var(--color-accent-bright); }
.hero-glow {
  position: absolute; left: -140px; bottom: -180px;
  width: 480px; height: 480px; border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 167, 44, 0.14), transparent 68%);
  animation: glowFloat 11s ease-in-out infinite alternate;
}
@keyframes glowFloat {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(60px, -46px, 0); }
}

.hero-inner {
  position: relative;
  display: flex; flex-direction: column; align-items: center;
  text-align: center;
}
.hero-kicker { color: var(--color-accent-bright); font-size: var(--fs-xs); }
.hero-kicker::after {
  content: ""; width: 28px; height: 1px; background: currentColor; opacity: 0.7;
}
.hero-title {
  margin-top: var(--space-5);
  font-size: var(--fs-hero);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: #fff;
  text-wrap: balance;
}
.title-dot {
  display: inline-block;
  width: 0.16em; height: 0.16em;
  margin: 0 0.28em;
  background: var(--color-accent-bright);
  transform: rotate(45deg) translateY(-0.35em);
}
.hero-sub {
  margin-top: var(--space-5);
  max-width: 620px;
  font-size: var(--fs-lg);
  line-height: 2;
  color: rgba(255, 255, 255, 0.78);
  text-wrap: balance;
}
.hero-actions {
  display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-3);
  margin-top: var(--space-6);
}

.hero-facts {
  display: grid; grid-template-columns: repeat(4, auto);
  gap: 0 clamp(28px, 5vw, 72px);
  margin: clamp(48px, 7vw, 84px) 0 0;
  padding-top: var(--space-5);
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}
.hero-facts div { text-align: center; }
.hero-facts dt {
  font-size: var(--fs-xs); letter-spacing: 0.26em;
  color: rgba(255, 255, 255, 0.5); margin-bottom: 6px;
}
.hero-facts dd {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.02rem; letter-spacing: 0.08em;
  color: var(--color-accent-bright);
}

.hero-side {
  position: absolute; right: clamp(10px, 3vw, 44px); top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-family: var(--font-display);
  font-size: 0.98rem; letter-spacing: 0.52em;
  color: rgba(255, 255, 255, 0.4);
  pointer-events: none;
}

.hero-scroll {
  position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%);
  display: inline-flex; flex-direction: column; align-items: center; gap: 10px;
  font-size: var(--fs-xs); letter-spacing: 0.3em;
  color: rgba(255, 255, 255, 0.55); text-decoration: none;
  transition: color 0.2s var(--ease-out);
}
.hero-scroll:hover { color: var(--color-accent-bright); }
.hero-scroll-line {
  width: 1px; height: 44px;
  background: linear-gradient(to bottom, transparent, var(--color-accent-bright));
  overflow: hidden; position: relative;
}
.hero-scroll-line::after {
  content: ""; position: absolute; left: 0; top: -40%;
  width: 100%; height: 40%;
  background: #fff;
  animation: scrollHint 2.2s var(--ease-out) infinite;
}
@keyframes scrollHint {
  to { top: 110%; }
}

/* ========== 品类滚动条 ========== */
.marquee {
  overflow: clip;
  background: var(--color-card);
  border-block: 1px solid var(--color-border);
}
.marquee-track { display: flex; width: max-content; animation: marquee 30s linear infinite; }
.marquee-track ul { display: flex; }
.marquee-track li {
  display: inline-flex; align-items: center; gap: 14px;
  padding: 18px 30px;
  font-family: var(--font-display);
  font-size: 1.02rem; letter-spacing: 0.28em;
  color: var(--color-secondary);
  white-space: nowrap;
}
.marquee-track li::before {
  content: ""; width: 6px; height: 6px; flex: none;
  background: var(--color-accent); transform: rotate(45deg);
}
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ========== 公司简介 ========== */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(40px, 6vw, 96px);
  align-items: start;
}
.about-head { position: sticky; top: calc(var(--header-h) + 24px); }
.about-head .kicker { display: inline-flex; }
.about-head .ornament { justify-content: flex-start; }
.about-lead {
  margin-top: var(--space-5);
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  line-height: 1.9;
  letter-spacing: 0.06em;
  color: var(--color-secondary);
}
.about-body > p { color: var(--color-muted-foreground); margin-bottom: var(--space-4); }
.about-body > p b { color: var(--color-foreground); font-weight: 600; }

.about-points { margin-top: var(--space-5); display: grid; gap: var(--space-4); }
.about-points li { display: flex; gap: var(--space-4); }
.about-points .icon {
  width: 30px; height: 30px; padding: 5px;
  color: var(--color-accent-ink);
  border: 1px solid rgba(161, 98, 7, 0.35);
  border-radius: 50%;
}
.about-points h3 { font-size: var(--fs-h3); letter-spacing: 0.08em; }
.about-points p { color: var(--color-muted-foreground); font-size: var(--fs-sm); margin-top: 4px; }

/* ========== 主营业务 ========== */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}
.biz-card {
  position: relative;
  display: flex; flex-direction: column;
  padding: var(--space-6) var(--space-5) var(--space-5);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}
.biz-card::before {
  content: ""; position: absolute; inset: 0 auto auto 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--color-accent), rgba(161, 98, 7, 0.15));
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.35s var(--ease-out);
}
.biz-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lift); border-color: var(--color-border-strong); }
.biz-card:hover::before { transform: scaleX(1); }

.biz-index {
  position: absolute; top: var(--space-4); right: var(--space-5);
  font-family: var(--font-display);
  font-size: 2.4rem; font-weight: 500; line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(161, 98, 7, 0.4);
}
.biz-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 56px; height: 56px; margin-bottom: var(--space-4);
  color: var(--color-accent-ink);
  background: rgba(161, 98, 7, 0.08);
  border: 1px solid rgba(161, 98, 7, 0.25);
  border-radius: 50%;
  transition: background-color 0.3s var(--ease-out), color 0.3s var(--ease-out);
}
.biz-card:hover .biz-icon { background: var(--color-primary); color: var(--color-accent-bright); border-color: var(--color-primary); }
.biz-icon .icon { width: 26px; height: 26px; }
.biz-card h3 { font-size: var(--fs-h3); letter-spacing: 0.1em; }
.biz-card p { margin-top: 10px; font-size: var(--fs-sm); color: var(--color-muted-foreground); flex: 1; }
.biz-tag {
  margin-top: var(--space-4);
  align-self: flex-start;
  font-size: var(--fs-xs); letter-spacing: 0.18em;
  color: var(--color-accent-ink);
  padding: 5px 12px;
  border: 1px solid rgba(161, 98, 7, 0.3);
  border-radius: 999px;
}

/* ========== 服务能力（深色） ========== */
.svc-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
}
.svc-card {
  position: relative;
  padding: var(--space-6) var(--space-5);
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: transform 0.3s var(--ease-out), border-color 0.3s var(--ease-out), background-color 0.3s var(--ease-out);
}
.svc-card:hover {
  transform: translateY(-6px);
  border-color: rgba(212, 167, 44, 0.55);
  background: rgba(255, 255, 255, 0.07);
}
.svc-num {
  position: absolute; top: var(--space-4); right: var(--space-5);
  font-family: var(--font-display); font-size: 2rem; line-height: 1;
  color: rgba(212, 167, 44, 0.35);
}
.svc-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 52px; height: 52px; margin-bottom: var(--space-4);
  color: var(--color-accent-bright);
  border: 1px solid rgba(212, 167, 44, 0.4);
  border-radius: 50%;
}
.svc-card h3 { font-size: 1.18rem; letter-spacing: 0.08em; color: #fff; }
.svc-card p { margin-top: 12px; font-size: var(--fs-sm); line-height: 1.9; color: #A8A29E; }
.svc-note {
  margin-top: var(--space-6);
  padding: 14px 22px;
  text-align: center;
  font-size: var(--fs-sm); letter-spacing: 0.12em;
  color: #D6D3D1;
  border: 1px dashed rgba(212, 167, 44, 0.4);
  border-radius: var(--radius-sm);
}

/* ========== 资质合规 ========== */
.lic-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  max-width: 860px;
  margin-inline: auto;
}
.lic-card {
  position: relative;
  text-align: center;
  padding: var(--space-7) var(--space-5) var(--space-6);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  outline: 1px solid var(--color-border);
  outline-offset: 5px;
  border-radius: var(--radius-sm);
  transition: box-shadow 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}
.lic-card:hover { box-shadow: var(--shadow-lift); transform: translateY(-4px); }
.lic-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 60px; height: 60px; margin-bottom: var(--space-4);
  color: var(--color-accent-ink);
  background: rgba(161, 98, 7, 0.08);
  border-radius: 50%;
}
.lic-icon .icon { width: 28px; height: 28px; }
.lic-card h3 { font-size: 1.22rem; letter-spacing: 0.12em; }
.lic-num {
  margin-top: 12px;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 1.1rem + 1vw, 1.7rem);
  font-weight: 700; letter-spacing: 0.14em;
  color: var(--color-accent);
}
.lic-note { margin-top: 10px; font-size: var(--fs-sm); color: var(--color-muted-foreground); }

.scope-box {
  max-width: 860px;
  margin: var(--space-6) auto 0;
  padding: var(--space-5) var(--space-6);
  background: var(--color-tint);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.scope-box h3 { font-size: var(--fs-h3); letter-spacing: 0.1em; margin-bottom: var(--space-3); }
.scope-box p { font-size: var(--fs-sm); line-height: 2; color: var(--color-muted-foreground); }
.scope-box p + p { margin-top: 10px; }
.scope-box strong { color: var(--color-foreground); font-weight: 600; }

/* ========== 联系我们 ========== */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}
.contact-info { display: grid; gap: var(--space-4); }
.info-card {
  display: flex; gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}
.info-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 48px; height: 48px; flex: none;
  color: var(--color-accent-ink);
  background: rgba(161, 98, 7, 0.08);
  border-radius: 50%;
}
.info-card h3 { font-size: 1.05rem; letter-spacing: 0.12em; }
.info-card p { margin-top: 6px; font-size: var(--fs-sm); color: var(--color-muted-foreground); line-height: 1.9; }

.contact-form {
  padding: var(--space-6);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.form-field { margin-bottom: var(--space-4); }
.form-field label {
  display: block;
  font-size: var(--fs-sm); font-weight: 600; letter-spacing: 0.06em;
  margin-bottom: 8px;
}
.req { color: var(--color-destructive); }
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 12px 14px;
  min-height: 46px;
  font: inherit; font-size: var(--fs-sm);
  color: var(--color-foreground);
  background: var(--color-background);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
}
.form-field textarea { resize: vertical; min-height: 120px; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(161, 98, 7, 0.15);
}
.form-field input[aria-invalid="true"],
.form-field textarea[aria-invalid="true"] { border-color: var(--color-destructive); }
.field-error { margin-top: 6px; font-size: var(--fs-xs); color: var(--color-destructive); }
.form-tip { margin-top: 12px; font-size: var(--fs-xs); color: var(--color-muted-foreground); text-align: center; }
.form-error {
  margin-top: 12px; padding: 12px 14px;
  font-size: var(--fs-sm); color: var(--color-destructive);
  background: #FEF2F2;
  border: 1px solid #FECACA;
  border-radius: var(--radius-sm);
}

.form-success {
  display: flex; align-items: center; gap: 10px;
  margin-top: var(--space-4);
  padding: 14px 16px;
  font-size: var(--fs-sm);
  color: #14532D;
  background: #F0FDF4;
  border: 1px solid #BBF7D0;
  border-radius: var(--radius-sm);
}
.form-success .icon { width: 20px; height: 20px; color: #15803D; }

/* ========== 页脚 ========== */
.site-footer {
  background: #141110;
  color: #D6D3D1;
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 3fr) minmax(0, 4fr);
  gap: clamp(32px, 5vw, 72px);
  padding-block: var(--space-8) var(--space-6);
}
.brand-invert .brand-text strong { color: #fff; }
.brand-invert .brand-text small { color: rgba(255, 255, 255, 0.55); }
.footer-brand p {
  margin-top: var(--space-4);
  font-size: var(--fs-sm); line-height: 2;
  color: #A8A29E;
}
.footer-nav h3, .footer-contact h3 {
  font-family: var(--font-body);
  font-size: var(--fs-sm); font-weight: 600; letter-spacing: 0.24em;
  color: #fff;
  margin-bottom: var(--space-4);
}
.footer-nav ul { display: grid; gap: 12px; }
.footer-nav a {
  display: inline-flex; align-items: center; min-height: 32px;
  font-size: var(--fs-sm); color: #A8A29E; text-decoration: none;
  transition: color 0.2s var(--ease-out);
}
.footer-nav a:hover { color: var(--color-accent-bright); }
.footer-contact p { font-size: var(--fs-sm); line-height: 2; color: #A8A29E; }
.footer-contact p + p { margin-top: 12px; }
.footer-contact a { color: #D6D3D1; text-decoration: none; border-bottom: 1px solid rgba(212, 167, 44, 0.4); }
.footer-contact a:hover { color: var(--color-accent-bright); }

.footer-beian {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-block: var(--space-4);
}
.beian-inner {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px var(--space-4);
  font-size: var(--fs-xs); letter-spacing: 0.04em;
  color: #78716C;
}
.beian-links a {
  color: #A8A29E; text-decoration: none;
  transition: color 0.2s var(--ease-out);
}
.beian-links a:hover { color: var(--color-accent-bright); }

/* ========== 返回顶部 ========== */
.to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 90;
  width: 46px; height: 46px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--color-primary); color: var(--color-accent-bright);
  border: 1px solid rgba(212, 167, 44, 0.5);
  border-radius: 50%; cursor: pointer;
  box-shadow: var(--shadow-lift);
  opacity: 0; transform: translateY(12px);
  transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out), background-color 0.2s var(--ease-out);
}
.to-top.is-shown { opacity: 1; transform: none; }
.to-top:hover { background: #000; }
.to-top .icon { width: 20px; height: 20px; }

/* ========== 滚动进入动画 ========== */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  transition-delay: var(--d, 0ms);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .svc-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-side { display: none; }
}

@media (max-width: 860px) {
  :root { --header-h: 64px; }
  .nav-toggle { display: inline-flex; }
  .nav-cta { display: none; }
  .site-nav {
    position: fixed; inset: 0; z-index: -1;
    flex-direction: column; justify-content: center;
    gap: var(--space-5);
    background: rgba(20, 17, 16, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    opacity: 0; visibility: hidden;
    transition: opacity 0.3s var(--ease-out), visibility 0.3s var(--ease-out);
  }
  .site-nav.is-open { opacity: 1; visibility: visible; }
  .site-nav ul { flex-direction: column; align-items: center; gap: var(--space-4); }
  .nav-link { font-size: var(--fs-lg); color: #fff; }
  .site-header.is-scrolled .nav-link { color: #fff; }

  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .about-head { position: static; }
  .biz-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .hero { padding-bottom: 88px; }
  .hero-facts { grid-template-columns: repeat(2, 1fr); gap: var(--space-4) var(--space-3); }
  .biz-grid, .svc-grid, .form-row { grid-template-columns: 1fr; }
  .lic-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-5); }
  .beian-inner { justify-content: center; text-align: center; }
  .hero-scroll { display: none; }
  .contact-form { padding: var(--space-5); }
}

/* ========== 动效偏好：减弱 ========== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .marquee-track { animation: none; flex-wrap: wrap; width: 100%; justify-content: center; }
  .marquee-track ul[aria-hidden="true"] { display: none; }
  .hero-glow, .hero-scroll-line::after { animation: none; }
}