/* ===== 全局 ===== */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --secondary: #8b5cf6;
  --accent: #06b6d4;
  --bg: #0f0f1a;
  --bg2: #1a1a2e;
  --bg3: #16213e;
  --card: rgba(255,255,255,0.05);
  --card-border: rgba(255,255,255,0.08);
  --text: #f1f5f9;
  --text2: #94a3b8;
  --text3: #64748b;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #06b6d4);
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(99,102,241,0.15);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== HEADER ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(15,15,26,0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.2rem; font-weight: 800;
}
.logo-icon { font-size: 1.6rem; }
.logo-text { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.main-nav { display: none; gap: 4px; }
.main-nav a {
  color: var(--text2); font-size: 0.9rem; padding: 6px 12px;
  border-radius: var(--radius-sm); transition: all .2s;
}
.main-nav a:hover { color: var(--text); background: var(--card); }
.mobile-menu-btn {
  display: flex; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 8px;
}
.mobile-menu-btn span {
  display: block; width: 22px; height: 2px;
  background: var(--text2); border-radius: 2px; transition: .3s;
}
.mobile-menu-btn.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-menu-btn.open span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
.mobile-nav-open .main-nav {
  display: flex; flex-direction: column;
  position: absolute; top: 64px; left: 0; right: 0;
  background: var(--bg2); border-bottom: 1px solid var(--card-border);
  padding: 12px;
}

/* ===== HERO ===== */
.hero {
  padding: 80px 0 60px;
  background: radial-gradient(ellipse at 50% 0%, rgba(99,102,241,0.2) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 50%, rgba(139,92,246,0.1) 0%, transparent 50%);
  text-align: center;
}
.hero-badge {
  display: inline-block;
  background: rgba(99,102,241,0.15); border: 1px solid rgba(99,102,241,0.4);
  color: #a5b4fc; padding: 5px 16px; border-radius: 20px;
  font-size: 0.82rem; margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900; line-height: 1.2;
  margin-bottom: 20px;
}
.hero h1 .grad { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero p { font-size: 1.1rem; color: var(--text2); max-width: 600px; margin: 0 auto 32px; }
.hero-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 32px; justify-content: center; margin-top: 48px; flex-wrap: wrap; }
.hero-stat { text-align: center; }
.hero-stat .num { font-size: 2rem; font-weight: 800; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-stat .label { font-size: 0.8rem; color: var(--text3); }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 50px; font-size: 0.95rem;
  font-weight: 700; cursor: pointer; transition: all .2s;
  border: none; font-family: inherit;
}
.btn-primary { background: var(--gradient); color: #fff; box-shadow: 0 4px 20px rgba(99,102,241,0.4); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(99,102,241,0.5); }
.btn-outline {
  background: transparent; color: var(--text);
  border: 1px solid var(--card-border);
}
.btn-outline:hover { background: var(--card); border-color: var(--primary); }
.btn-sm { padding: 8px 20px; font-size: 0.85rem; }
.btn-block { width: 100%; justify-content: center; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; }

/* ===== SECTION ===== */
.section { padding: 72px 0; }
.section-sm { padding: 48px 0; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-label {
  display: inline-block;
  background: rgba(99,102,241,0.1); color: #a5b4fc;
  font-size: 0.78rem; font-weight: 600; padding: 4px 14px;
  border-radius: 20px; margin-bottom: 12px; letter-spacing: .5px;
}
.section-header h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; margin-bottom: 12px; }
.section-header p { color: var(--text2); font-size: 1rem; }
.divider { height: 1px; background: var(--card-border); margin: 0 0 48px; }

/* ===== PACKAGES ===== */
.packages-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.package-card {
  background: var(--bg2); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 28px; position: relative;
  transition: all .3s; overflow: hidden;
}
.package-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient); opacity: 0; transition: .3s;
}
.package-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow); }
.package-card:hover::before { opacity: 1; }
.package-card.featured {
  border-color: var(--primary);
  background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(139,92,246,0.05));
}
.package-card.featured::before { opacity: 1; }
.package-badge {
  position: absolute; top: 16px; right: 16px;
  padding: 3px 10px; border-radius: 20px; font-size: 0.72rem; font-weight: 700;
}
.badge-hot { background: rgba(239,68,68,.2); color: #f87171; border: 1px solid rgba(239,68,68,.3); }
.badge-rec { background: rgba(99,102,241,.2); color: #a5b4fc; border: 1px solid rgba(99,102,241,.3); }
.badge-new { background: rgba(16,185,129,.2); color: #34d399; border: 1px solid rgba(16,185,129,.3); }
.package-type { font-size: 0.78rem; color: var(--text3); margin-bottom: 8px; text-transform: uppercase; letter-spacing: .5px; }
.package-name { font-size: 1.15rem; font-weight: 800; margin-bottom: 4px; }
.package-price { margin: 16px 0; display: flex; align-items: baseline; gap: 6px; }
.price-amount { font-size: 2.2rem; font-weight: 900; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.price-unit { color: var(--text3); font-size: 0.85rem; }
.price-original { color: var(--text3); font-size: 0.9rem; text-decoration: line-through; }
.package-desc { color: var(--text2); font-size: 0.88rem; margin-bottom: 16px; }
.package-features { list-style: none; display: flex; flex-direction: column; gap: 8px; margin-bottom: 24px; }
.package-features li { font-size: 0.875rem; color: var(--text2); display: flex; align-items: flex-start; gap: 8px; }
.package-features li::before { content: '✓'; color: var(--success); font-weight: 700; flex-shrink: 0; margin-top: 1px; }

/* ===== SERVICE CARDS ===== */
.service-grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
.service-card {
  background: var(--bg2); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 32px; display: flex; gap: 24px;
  align-items: flex-start; transition: all .3s;
}
.service-card:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.service-icon { font-size: 2.5rem; flex-shrink: 0; }
.service-body h3 { font-size: 1.25rem; font-weight: 800; margin-bottom: 8px; }
.service-body p { color: var(--text2); font-size: 0.9rem; margin-bottom: 16px; }
.service-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
  background: rgba(99,102,241,0.1); color: #a5b4fc;
  border: 1px solid rgba(99,102,241,0.2);
  padding: 3px 10px; border-radius: 20px; font-size: 0.75rem;
}

/* ===== FAQ ===== */
.faq-list { display: flex; flex-direction: column; gap: 12px; max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--bg2); border: 1px solid var(--card-border); border-radius: var(--radius-sm); overflow: hidden; }
.faq-q {
  width: 100%; background: none; border: none; color: var(--text);
  padding: 18px 20px; text-align: left; cursor: pointer;
  font-size: 0.95rem; font-weight: 600; font-family: inherit;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq-q .arrow { color: var(--text3); transition: .3s; flex-shrink: 0; font-size: 0.8rem; }
.faq-item.open .faq-q .arrow { transform: rotate(180deg); color: var(--primary); }
.faq-a { display: none; padding: 0 20px 18px; color: var(--text2); font-size: 0.9rem; line-height: 1.7; }
.faq-item.open .faq-a { display: block; }

/* ===== ORDER FORM ===== */
.order-wrap { max-width: 600px; margin: 0 auto; }
.form-card { background: var(--bg2); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 32px; }
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 0.9rem; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.form-label .required { color: var(--danger); }
.form-control {
  width: 100%; padding: 12px 16px;
  background: rgba(255,255,255,0.05); border: 1px solid var(--card-border);
  border-radius: var(--radius-sm); color: var(--text); font-size: 0.95rem;
  font-family: inherit; outline: none; transition: border-color .2s;
}
.form-control:focus { border-color: var(--primary); }
.form-control::placeholder { color: var(--text3); }
select.form-control { appearance: none; cursor: pointer; }
textarea.form-control { resize: vertical; min-height: 90px; }
.form-hint { font-size: 0.8rem; color: var(--text3); margin-top: 4px; }

/* ===== PAY PAGE ===== */
.pay-card { background: var(--bg2); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 32px; max-width: 480px; margin: 0 auto; text-align: center; }
.pay-qr-wrap { background: #fff; border-radius: 12px; padding: 16px; display: inline-block; margin: 20px 0; }
.pay-qr-wrap img { width: 200px; height: 200px; }
.pay-amount { font-size: 2.2rem; font-weight: 900; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.order-info { background: rgba(99,102,241,0.08); border: 1px solid rgba(99,102,241,0.2); border-radius: var(--radius-sm); padding: 16px; margin: 16px 0; text-align: left; }
.order-info p { font-size: 0.875rem; color: var(--text2); margin-bottom: 6px; display: flex; justify-content: space-between; }
.order-info p:last-child { margin-bottom: 0; }
.order-info p strong { color: var(--text); }

/* ===== ARTICLES ===== */
.articles-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px,1fr)); gap: 20px; }
.article-card {
  background: var(--bg2); border: 1px solid var(--card-border);
  border-radius: var(--radius); overflow: hidden; transition: all .3s;
  display: block; color: var(--text);
}
.article-card:hover { border-color: var(--primary); transform: translateY(-3px); box-shadow: var(--shadow); }
.article-thumb { height: 140px; background: linear-gradient(135deg, var(--bg3), var(--bg2)); display: flex; align-items: center; justify-content: center; font-size: 3rem; }
.article-body { padding: 20px; }
.article-body h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
.article-body p { font-size: 0.85rem; color: var(--text2); line-height: 1.6; margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-meta { display: flex; gap: 12px; font-size: 0.78rem; color: var(--text3); }
.article-detail { max-width: 800px; margin: 0 auto; }
.article-detail h1 { font-size: clamp(1.4rem,3vw,2rem); font-weight: 800; margin-bottom: 16px; }
.article-content { color: var(--text2); line-height: 1.9; font-size: 0.95rem; }
.article-content h2 { color: var(--text); font-size: 1.3rem; font-weight: 700; margin: 28px 0 12px; }
.article-content p { margin-bottom: 14px; }

/* ===== NOTICE ===== */
.notice { padding: 12px 16px; border-radius: var(--radius-sm); font-size: 0.88rem; display: flex; gap: 10px; align-items: flex-start; }
.notice-info { background: rgba(99,102,241,0.1); border: 1px solid rgba(99,102,241,0.2); color: #a5b4fc; }
.notice-warn { background: rgba(245,158,11,0.1); border: 1px solid rgba(245,158,11,0.2); color: #fcd34d; }
.notice-success { background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.2); color: #34d399; }

/* ===== STEPS ===== */
.steps { display: flex; flex-direction: column; gap: 0; counter-reset: step; }
.step-item { display: flex; gap: 20px; padding-bottom: 28px; position: relative; }
.step-item:not(:last-child)::before { content: ''; position: absolute; left: 19px; top: 40px; bottom: 0; width: 2px; background: var(--card-border); }
.step-num { width: 40px; height: 40px; background: var(--gradient); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 0.9rem; flex-shrink: 0; position: relative; z-index: 1; }
.step-body h3 { font-size: 1rem; font-weight: 700; margin-bottom: 4px; padding-top: 9px; }
.step-body p { font-size: 0.875rem; color: var(--text2); }

/* ===== TRUST BADGES ===== */
.trust-bar { display: flex; gap: 24px; flex-wrap: wrap; justify-content: center; padding: 24px 0; border-top: 1px solid var(--card-border); border-bottom: 1px solid var(--card-border); }
.trust-item { display: flex; align-items: center; gap: 8px; font-size: 0.875rem; color: var(--text2); }
.trust-item .ico { font-size: 1.2rem; }

/* ===== FOOTER ===== */
.site-footer { background: var(--bg2); border-top: 1px solid var(--card-border); padding: 48px 0 24px; margin-top: 48px; }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 32px; margin-bottom: 32px; }
.footer-brand p { color: var(--text3); font-size: 0.875rem; line-height: 1.7; }
.footer-col h4 { color: var(--text); font-size: 0.875rem; font-weight: 700; margin-bottom: 14px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-col ul li, .footer-col ul li a { color: var(--text3); font-size: 0.85rem; transition: color .2s; }
.footer-col ul li a:hover { color: var(--text); }
.footer-bottom { border-top: 1px solid var(--card-border); padding-top: 20px; display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; font-size: 0.82rem; color: var(--text3); }
.footer-bottom a { color: var(--text3); }

/* ===== RESPONSIVE ===== */
@media (min-width: 768px) {
  .main-nav { display: flex; }
  .mobile-menu-btn { display: none; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}
@media (min-width: 1024px) { .service-grid { grid-template-columns: repeat(3, 1fr); } }

/* ===== UTILS ===== */
.text-grad { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.text-muted { color: var(--text2); }
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-24 { margin-bottom: 24px; }
.gap-12 { gap: 12px; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }