/* ========================================
   闫宝龙 · TikTok 营销 - 样式表
   风格:深空蓝底 + TikTok 活力橙渐变
   优先使用系统字体,避免侵权
   ======================================== */

:root {
  --c-bg: #0B1020;
  --c-bg-2: #0F172A;
  --c-surface: #111A30;
  --c-surface-2: #16213E;
  --c-border: rgba(148, 163, 184, 0.18);
  --c-text: #E2E8F0;
  --c-text-soft: #94A3B8;
  --c-text-mute: #64748B;
  --c-primary: #F97316;
  --c-primary-2: #EF4444;
  --c-accent: #0EA5E9;
  --c-accent-2: #22D3EE;
  --c-white: #F8FAFC;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 12px 32px rgba(2, 6, 23, 0.45);
  --shadow-lg: 0 24px 60px rgba(2, 6, 23, 0.55);
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --container: 1200px;
  --header-h: 72px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Heiti SC", "Noto Sans SC", "Source Han Sans SC", "WenQuanYi Micro Hei", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "Cascadia Code", "Consolas", "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; text-decoration: none; transition: color .25s ease, opacity .25s ease; }
a:hover { color: var(--c-primary); }

button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

h1, h2, h3, h4, h5 { margin: 0; line-height: 1.25; letter-spacing: -0.01em; color: var(--c-white); }

p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* ============ 顶部导航 ============ */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 100;
  background: rgba(11, 16, 32, 0.45);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: background .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.site-header.is-scrolled {
  background: rgba(11, 16, 32, 0.85);
  border-bottom-color: var(--c-border);
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
}

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--c-white);
  font-weight: 700;
  white-space: nowrap;
  font-size: 18px;
}
.brand:hover { color: var(--c-white); }
.brand-name { letter-spacing: 0.02em; }
.brand-r { font-size: 0.6em; vertical-align: super; color: var(--c-primary); }
.brand-divider { color: var(--c-text-soft); font-weight: 400; }
.brand-tag {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 700;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-menu a {
  position: relative;
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--c-text);
  font-size: 14.5px;
  font-weight: 500;
  transition: color .25s ease;
}
.nav-menu a::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: 2px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-primary-2));
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .3s ease;
}
.nav-menu a:hover { color: var(--c-white); }
.nav-menu a:hover::after { transform: scaleX(1); }
.nav-menu a.nav-cta {
  margin-left: 8px;
  padding: 9px 18px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-2));
  color: #fff;
  border-radius: 999px;
  font-weight: 600;
  box-shadow: 0 8px 20px rgba(249, 115, 22, 0.32);
}
.nav-menu a.nav-cta::after { display: none; }
.nav-menu a.nav-cta:hover { transform: translateY(-1px); color: #fff; }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border-radius: 8px;
  border: 1px solid var(--c-border);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  padding: 0;
}
.nav-toggle span {
  display: block;
  width: 18px; height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: transform .3s ease, opacity .3s ease;
}

/* ============ Hero ============ */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 80px) 0 120px;
  overflow: hidden;
  isolation: isolate;
}
.hero-bg { position: absolute; inset: 0; z-index: -1; }
.hero-bg::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(1200px 600px at 20% 10%, rgba(249, 115, 22, 0.18), transparent 60%),
    radial-gradient(900px 500px at 90% 20%, rgba(14, 165, 233, 0.18), transparent 60%),
    linear-gradient(180deg, #0B1020 0%, #0F172A 100%);
}
.hero-grid {
  position: absolute; inset: -2px;
  background-image:
    linear-gradient(rgba(148,163,184,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148,163,184,0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  animation: gridDrift 30s linear infinite;
}
@keyframes gridDrift {
  0% { transform: translate(0,0); }
  100% { transform: translate(48px, 48px); }
}
.hero-glow {
  position: absolute;
  width: 480px; height: 480px;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.55;
}
.hero-glow-1 {
  top: -120px; left: -120px;
  background: radial-gradient(circle, var(--c-primary), transparent 60%);
  animation: floatA 14s ease-in-out infinite;
}
.hero-glow-2 {
  bottom: -160px; right: -160px;
  background: radial-gradient(circle, var(--c-accent), transparent 60%);
  animation: floatB 18s ease-in-out infinite;
}
@keyframes floatA { 0%,100%{transform:translate(0,0)} 50%{transform:translate(60px,40px)} }
@keyframes floatB { 0%,100%{transform:translate(0,0)} 50%{transform:translate(-40px,60px)} }

.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 64px;
  align-items: center;
}

.hero-eyebrow {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid rgba(249, 115, 22, 0.35);
  background: rgba(249, 115, 22, 0.08);
  color: var(--c-primary);
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 0.06em;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero-title {
  font-size: clamp(32px, 4.4vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.hero-accent {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-2) 50%, var(--c-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  font-size: 16.5px;
  color: var(--c-text-soft);
  max-width: 560px;
  margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 32px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 26px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-2));
  color: #fff;
  box-shadow: 0 12px 28px rgba(249,115,22,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 36px rgba(249,115,22,0.45); color: #fff; }
.btn-ghost {
  border: 1px solid var(--c-border);
  color: var(--c-white);
  background: rgba(255,255,255,0.02);
}
.btn-ghost:hover { border-color: var(--c-primary); color: var(--c-primary); background: rgba(249,115,22,0.06); }

.hero-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px 18px;
  font-size: 14.5px;
  color: var(--c-text-soft);
}
.hero-points li { display: flex; align-items: center; gap: 8px; }
.hero-points .dot {
  width: 6px; height: 6px;
  background: var(--c-primary);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(249,115,22,0.18);
}

.hero-card {
  position: relative;
  border-radius: var(--radius-xl);
  padding: 2px;
  background: linear-gradient(135deg, rgba(249,115,22,0.6), rgba(14,165,233,0.5));
  box-shadow: var(--shadow-lg);
  animation: cardFloat 8s ease-in-out infinite;
}
@keyframes cardFloat { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }
.hero-card-inner {
  background: linear-gradient(180deg, #0F172A, #111A30);
  border-radius: calc(var(--radius-xl) - 2px);
  padding: 32px;
  position: relative;
  overflow: hidden;
}
.hero-card-inner::before {
  content: "";
  position: absolute;
  inset: -1px;
  background: radial-gradient(400px 200px at 20% 0%, rgba(249,115,22,0.25), transparent 60%);
  pointer-events: none;
}
.hero-card-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-border);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-white);
}
.hero-card-row:last-of-type { border-bottom: none; }
.hero-tag-orange, .hero-tag-cyan {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  letter-spacing: 0.04em;
}
.hero-tag-orange { background: rgba(249,115,22,0.15); color: var(--c-primary); border: 1px solid rgba(249,115,22,0.3); }
.hero-tag-cyan { background: rgba(14,165,233,0.15); color: var(--c-accent-2); border: 1px solid rgba(14,165,233,0.3); }
.hero-card-foot {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--c-border);
  color: var(--c-text-soft);
  font-size: 13px;
  letter-spacing: 0.04em;
}

/* ============ Sections ============ */
.section { padding: 100px 0; }
.section-alt { background: linear-gradient(180deg, transparent, rgba(15, 23, 42, 0.6) 50%, transparent); }

.section-head {
  max-width: 760px;
  margin: 0 auto 56px;
  text-align: center;
}
.section-eyebrow {
  display: inline-block;
  font-size: 12.5px;
  letter-spacing: 0.24em;
  font-weight: 700;
  color: var(--c-primary);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}
.section-sub {
  font-size: 16px;
  color: var(--c-text-soft);
}

/* ============ Grid ============ */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ============ Service Cards ============ */
.card {
  position: relative;
  background: linear-gradient(180deg, var(--c-surface), var(--c-surface-2));
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: transform .35s ease, border-color .35s ease, box-shadow .35s ease;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(249,115,22,0.08), transparent 40%);
  opacity: 0;
  transition: opacity .35s ease;
  pointer-events: none;
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(249,115,22,0.4);
  box-shadow: 0 24px 48px rgba(2,6,23,0.55);
}
.card:hover::before { opacity: 1; }
.card-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(249,115,22,0.18), rgba(239,68,68,0.18));
  color: var(--c-primary);
  margin-bottom: 20px;
}
.card-icon svg { width: 26px; height: 26px; }
.card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}
.card p {
  color: var(--c-text-soft);
  font-size: 14.5px;
  margin-bottom: 16px;
}
.card-list { font-size: 13.5px; color: var(--c-text-soft); }
.card-list li {
  padding: 6px 0 6px 18px;
  position: relative;
}
.card-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 14px;
  width: 8px; height: 2px;
  background: var(--c-primary);
  border-radius: 2px;
}

/* ============ Steps ============ */
.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  position: relative;
}
.step {
  background: linear-gradient(180deg, var(--c-surface), var(--c-surface-2));
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  position: relative;
  transition: transform .35s ease, border-color .35s ease;
}
.step:hover { transform: translateY(-4px); border-color: rgba(249,115,22,0.4); }
.step-num {
  font-family: var(--font-mono);
  font-size: 36px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.step h3 { font-size: 18px; margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--c-text-soft); margin: 0; }

/* ============ Timeline ============ */
.timeline {
  position: relative;
  padding-left: 28px;
  max-width: 880px;
  margin: 0 auto;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 6px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-primary), var(--c-accent));
  border-radius: 2px;
}
.timeline-item {
  position: relative;
  padding: 18px 0 18px 28px;
}
.timeline-dot {
  position: absolute;
  left: -28px; top: 26px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--c-bg);
  border: 3px solid var(--c-primary);
  box-shadow: 0 0 0 4px rgba(249,115,22,0.18);
}
.timeline-item h3 {
  font-size: 18px;
  margin-bottom: 6px;
  color: var(--c-white);
}
.timeline-item p { font-size: 14.5px; color: var(--c-text-soft); margin: 0; }

/* ============ Chip (Industries) ============ */
.chip {
  background: linear-gradient(180deg, var(--c-surface), var(--c-surface-2));
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 24px 22px;
  transition: transform .35s ease, border-color .35s ease;
}
.chip:hover { transform: translateY(-4px); border-color: rgba(14,165,233,0.4); }
.chip-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-accent-2);
  letter-spacing: 0.18em;
  margin-bottom: 10px;
}
.chip h3 { font-size: 17px; margin-bottom: 6px; }
.chip p { font-size: 13.5px; color: var(--c-text-soft); margin: 0; }

/* ============ Stats ============ */
.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-bottom: 56px;
}
.stat {
  background: linear-gradient(180deg, rgba(249,115,22,0.06), var(--c-surface));
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: transform .35s ease, border-color .35s ease;
}
.stat:hover { transform: translateY(-4px); border-color: rgba(249,115,22,0.4); }
.stat-num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 800;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-white);
  margin-bottom: 6px;
}
.stat-desc { font-size: 13px; color: var(--c-text-soft); margin: 0; }

.cases-grid { margin-top: 8px; }
.case {
  background: linear-gradient(180deg, var(--c-surface), var(--c-surface-2));
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform .35s ease, border-color .35s ease;
}
.case:hover { transform: translateY(-4px); border-color: rgba(249,115,22,0.4); }
.case-tag {
  display: inline-block;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(14,165,233,0.15);
  color: var(--c-accent-2);
  border: 1px solid rgba(14,165,233,0.3);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}
.case h3 { font-size: 18px; margin-bottom: 10px; }
.case p { font-size: 14px; color: var(--c-text-soft); margin: 0; }

/* ============ About ============ */
.about {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 56px;
  align-items: center;
}
.about-photo {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.about-photo img {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid transparent;
  background:
    linear-gradient(var(--c-bg), var(--c-bg)) padding-box,
    linear-gradient(135deg, var(--c-primary), var(--c-accent)) border-box;
  box-shadow: var(--shadow-lg);
}
.about-photo-tag {
  font-size: 13px;
  color: var(--c-text-soft);
  letter-spacing: 0.06em;
}
.about-text h3 {
  font-size: clamp(22px, 2.4vw, 28px);
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--c-white), var(--c-text));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.about-text p { color: var(--c-text-soft); }
.about-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 18px;
  margin: 20px 0 28px;
}
.about-list li { display: flex; align-items: center; gap: 8px; font-size: 14.5px; color: var(--c-text); }
.about-list .dot {
  width: 6px; height: 6px;
  background: var(--c-primary);
  border-radius: 50%;
}
.about-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ============ FAQ ============ */
.faq {
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: linear-gradient(180deg, var(--c-surface), var(--c-surface-2));
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color .25s ease, background .25s ease;
}
.faq-item[open] {
  border-color: rgba(249,115,22,0.4);
  background: linear-gradient(180deg, var(--c-surface-2), var(--c-surface));
}
.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 22px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-white);
  position: relative;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-primary);
  background: rgba(249,115,22,0.12);
  border: 1px solid rgba(249,115,22,0.3);
  padding: 2px 8px;
  border-radius: 6px;
  flex-shrink: 0;
}
.faq-q { flex: 1; }
.faq-arrow {
  width: 12px; height: 12px;
  border-right: 2px solid var(--c-text-soft);
  border-bottom: 2px solid var(--c-text-soft);
  transform: rotate(45deg);
  transition: transform .3s ease, border-color .3s ease;
  margin-top: -4px;
  flex-shrink: 0;
}
.faq-item[open] .faq-arrow { transform: rotate(-135deg); border-color: var(--c-primary); }
.faq-a {
  padding: 0 22px 20px 60px;
  color: var(--c-text-soft);
  font-size: 14.5px;
  line-height: 1.8;
}

/* ============ Contact ============ */
.section-contact { padding-bottom: 120px; }
.contact {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 56px;
  align-items: center;
  max-width: 980px;
  margin: 0 auto;
  background: linear-gradient(180deg, var(--c-surface), var(--c-surface-2));
  border: 1px solid var(--c-border);
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: var(--shadow-md);
}
.contact-info { display: grid; gap: 18px; }
.contact-item {
  padding: 14px 18px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 18px;
  transition: border-color .25s ease, background .25s ease;
}
.contact-item:hover { border-color: rgba(249,115,22,0.4); background: rgba(249,115,22,0.04); }
.contact-label {
  font-size: 13px;
  color: var(--c-text-soft);
  min-width: 86px;
  letter-spacing: 0.04em;
}
.contact-value {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-white);
}

.contact-qr {
  text-align: center;
  padding: 24px;
  background: linear-gradient(180deg, rgba(14,165,233,0.08), transparent);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
}
.contact-qr img {
  width: 220px; height: 220px;
  margin: 0 auto 12px;
  border-radius: 12px;
  border: 4px solid #fff;
  background: #fff;
}
.contact-qr p { color: var(--c-text-soft); font-size: 14px; margin: 0; }

/* ============ Links ============ */
.links-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
}
.links-grid li a {
  display: block;
  padding: 14px 12px;
  background: linear-gradient(180deg, var(--c-surface), var(--c-surface-2));
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  text-align: center;
  color: var(--c-text);
  transition: transform .25s ease, border-color .25s ease, color .25s ease, background .25s ease;
}
.links-grid li a:hover {
  transform: translateY(-3px);
  border-color: rgba(249,115,22,0.5);
  color: var(--c-primary);
  background: rgba(249,115,22,0.06);
}

/* ============ Footer ============ */
.site-footer {
  background: linear-gradient(180deg, #0B1020, #060914);
  border-top: 1px solid var(--c-border);
  margin-top: 40px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 48px;
  padding: 64px 24px 40px;
}
.footer-brand p {
  color: var(--c-text-soft);
  font-size: 14px;
  margin-top: 16px;
  max-width: 360px;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.footer-col { display: flex; flex-direction: column; gap: 10px; }
.footer-col h4 {
  font-size: 15px;
  margin-bottom: 6px;
  color: var(--c-white);
}
.footer-col a {
  color: var(--c-text-soft);
  font-size: 14px;
  transition: color .25s ease;
}
.footer-col a:hover { color: var(--c-primary); }

.footer-copy {
  border-top: 1px solid var(--c-border);
  padding: 20px 0;
  background: rgba(0,0,0,0.25);
}
.footer-copy-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
  align-items: center;
}
.footer-copy p {
  margin: 0;
  color: var(--c-text-mute);
  font-size: 13px;
}
.footer-copy a {
  color: var(--c-text-soft);
  transition: color .25s ease;
}
.footer-copy a:hover { color: var(--c-primary); }
.footer-beian { display: flex; flex-wrap: wrap; gap: 12px 18px; }

/* ============ Reveal Animation ============ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s ease, transform .7s ease;
  transition-delay: var(--delay, 0s);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .links-grid { grid-template-columns: repeat(4, 1fr); }
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; padding-top: 48px; }
}

@media (max-width: 768px) {
  :root { --header-h: 60px; }
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(11, 16, 32, 0.98);
    backdrop-filter: blur(14px);
    padding: 16px 20px 24px;
    gap: 4px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    border-bottom: 1px solid var(--c-border);
    transition: transform .3s ease, opacity .3s ease;
  }
  .nav-menu.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-menu a {
    padding: 12px 14px;
    border-radius: 8px;
    font-size: 15px;
  }
  .nav-menu a.nav-cta { text-align: center; margin: 8px 0 0; }

  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .links-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-points { grid-template-columns: repeat(2, 1fr); }
  .about { grid-template-columns: 1fr; gap: 32px; text-align: center; }
  .about-photo { margin: 0 auto; }
  .about-actions { justify-content: center; }
  .about-list { grid-template-columns: 1fr; text-align: left; }
  .contact { grid-template-columns: 1fr; padding: 32px 24px; gap: 32px; }
  .contact-qr img { width: 180px; height: 180px; }
  .section { padding: 72px 0; }
  .hero { padding-bottom: 80px; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .footer-copy-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .nav-inner { padding: 0 16px; }
  .brand { font-size: 15px; gap: 6px; }
  .footer-cols { grid-template-columns: 1fr; }
  .faq-item summary { font-size: 14.5px; padding: 16px 18px; gap: 10px; }
  .faq-a { padding: 0 18px 18px 18px; }
  .contact-item { flex-wrap: wrap; }
  .contact-label { min-width: 72px; }
  .links-grid { grid-template-columns: 1fr 1fr; }
}

/* ============ Focus ============ */
:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 3px;
  border-radius: 4px;
}