/* ===== RESET & BASE ===== */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap');

* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --black: #0d0d0d;
  --dark: #1a1a1a;
  --dark2: #222;
  --orange: #ff6b35;
  --orange-dark: #e55a2b;
  --orange-light: #ff8c5a;
  --yellow: #ffc233;
  --bg: #fafaf8;
  --bg-warm: #f5f3ef;
  --text: #2d2d2d;
  --text-light: #6b6b6b;
  --text-lighter: #999;
  --white: #fff;
  --border: #e8e6e2;
  --green: #2ecc71;
  --red: #e74c3c;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--orange); text-decoration: none; transition: all 0.2s; }
a:hover { color: var(--orange-dark); }

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

/* ===== NAV ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(13,13,13,0.95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 32px;
  height: 64px; display: flex; align-items: center; justify-content: space-between;
}

.nav-logo {
  font-size: 18px; font-weight: 900; color: var(--white);
  letter-spacing: 2px; text-decoration: none;
}
.nav-logo em { font-style: normal; color: var(--orange); }

.nav-links { display: flex; gap: 4px; }

.nav-links a {
  color: rgba(255,255,255,0.55); text-decoration: none;
  font-size: 13px; font-weight: 400; padding: 6px 14px;
  border-radius: 6px; transition: all 0.2s; letter-spacing: 0.5px;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--white); background: rgba(255,255,255,0.08);
}

.nav-mobile-btn {
  display: none; color: var(--white); font-size: 24px;
  background: none; border: none; cursor: pointer;
}

.mobile-menu {
  display: none; position: fixed; top: 64px; left: 0; right: 0;
  background: rgba(13,13,13,0.98); padding: 20px 32px; z-index: 999;
  flex-direction: column; gap: 4px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.mobile-menu.active { display: flex; }
.mobile-menu a {
  color: rgba(255,255,255,0.6); text-decoration: none;
  font-size: 15px; padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.mobile-menu a:hover { color: var(--orange); }

/* ===== PAGE HERO (subpages) ===== */
.page-hero {
  background: var(--black); padding: 120px 32px 64px;
  position: relative; overflow: hidden;
}
.page-hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 800px 600px at 30% 50%, rgba(255,107,53,0.06), transparent);
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero .tag {
  font-size: 12px; font-weight: 700; color: var(--orange);
  letter-spacing: 3px; text-transform: uppercase; margin-bottom: 16px;
  display: block;
}
.page-hero h1 {
  font-size: 40px; font-weight: 900; color: var(--white);
  line-height: 1.3; letter-spacing: 2px; margin-bottom: 16px;
}
.page-hero h1 em { font-style: normal; color: var(--orange); }
.page-hero p {
  font-size: 16px; color: rgba(255,255,255,0.5);
  max-width: 600px; line-height: 2;
}

/* ===== COMMON ===== */
section { padding: 80px 32px; }
.container { max-width: 1100px; margin: 0 auto; }

.sec-title {
  font-size: 28px; font-weight: 900; color: var(--text);
  margin-bottom: 16px; line-height: 1.4;
}
.sec-title em { font-style: normal; color: var(--orange); }

.sec-subtitle {
  font-size: 15px; color: var(--text-light);
  margin-bottom: 40px; max-width: 640px; line-height: 2;
}

.card {
  background: var(--white); border-radius: 14px;
  padding: 32px 28px; border: 1px solid var(--border);
  transition: all 0.3s;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.06);
}

.highlight-box {
  background: var(--bg-warm); border-radius: 12px;
  padding: 24px 28px; border-left: 4px solid var(--orange);
  margin: 32px 0;
}
.highlight-box p {
  font-size: 15px; color: var(--text); line-height: 2;
}

.quote-block {
  border-left: 3px solid var(--orange);
  padding: 16px 24px; margin: 24px 0;
  background: rgba(255,107,53,0.03); border-radius: 0 8px 8px 0;
}
.quote-block p {
  font-size: 16px; font-weight: 700; color: var(--text);
  line-height: 1.9;
}
.quote-block cite {
  font-size: 13px; color: var(--text-lighter);
  font-style: normal; display: block; margin-top: 8px;
}

.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; background: var(--orange); color: var(--white);
  border: none; border-radius: 8px; font-size: 15px; font-weight: 700;
  letter-spacing: 1px; text-decoration: none; transition: all 0.3s; cursor: pointer;
}
.btn-primary:hover {
  background: var(--orange-dark); color: var(--white);
  transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,107,53,0.25);
}

.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; background: transparent; color: var(--text);
  border: 2px solid var(--border); border-radius: 8px;
  font-size: 14px; font-weight: 700; text-decoration: none;
  transition: all 0.3s; cursor: pointer;
}
.btn-outline:hover {
  border-color: var(--orange); color: var(--orange);
}

/* ===== CONTENT PROSE ===== */
.prose { max-width: 780px; }
.prose h2 {
  font-size: 24px; font-weight: 900; color: var(--text);
  margin: 48px 0 16px; line-height: 1.4;
}
.prose h3 {
  font-size: 20px; font-weight: 900; color: var(--text);
  margin: 36px 0 12px; line-height: 1.4;
}
.prose p {
  font-size: 16px; color: var(--text-light); line-height: 2.1;
  margin-bottom: 20px;
}
.prose strong { color: var(--text); font-weight: 700; }
.prose em.hl { font-style: normal; color: var(--orange); font-weight: 700; }

/* ===== FOOTER ===== */
.site-footer {
  background: var(--black); color: rgba(255,255,255,0.35);
  padding: 48px 32px 32px; text-align: center;
  font-size: 13px; line-height: 2.2;
}
.footer-brand {
  font-size: 16px; font-weight: 700;
  color: rgba(255,255,255,0.6); letter-spacing: 1px; margin-bottom: 8px;
}
.footer-links {
  margin: 16px 0; display: flex; justify-content: center;
  gap: 24px; flex-wrap: wrap;
}
.site-footer a {
  color: rgba(255,255,255,0.4); text-decoration: none;
}
.site-footer a:hover { color: var(--orange); }
.footer-slogan {
  margin-top: 16px; font-size: 14px;
  color: rgba(255,255,255,0.2); font-weight: 500; letter-spacing: 4px;
}

/* ===== CTA STRIP ===== */
.cta-strip {
  background: var(--black); padding: 56px 32px; text-align: center;
}
.cta-strip h3 {
  font-size: 24px; font-weight: 900; color: var(--white);
  margin-bottom: 12px;
}
.cta-strip p {
  font-size: 15px; color: rgba(255,255,255,0.5);
  margin-bottom: 28px;
}
.cta-strip .qr-box {
  display: inline-block; background: var(--white);
  padding: 16px; border-radius: 14px;
  box-shadow: 0 16px 48px rgba(0,0,0,0.2);
}
.cta-strip .qr-box img { width: 180px; height: 180px; }
.cta-strip .hint {
  margin-top: 14px; font-size: 12px; color: rgba(255,255,255,0.3);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-mobile-btn { display: block; }
  section { padding: 56px 20px; }
  .page-hero { padding: 100px 20px 48px; }
  .page-hero h1 { font-size: 28px; }
  .sec-title { font-size: 22px; }
}

@media (max-width: 480px) {
  .page-hero h1 { font-size: 24px; }
}