/* ===== 凹3镜像网 · Anthropic 风格样式 ===== */
:root {
  --canvas: #faf9f5;
  --surface: #f0eee6;
  --surface-warm: #e3dacc;
  --ink: #141413;
  --ink-soft: #3d3d3a;
  --muted: #5e5d59;
  --secondary: #87867f;
  --hairline: #d1cfc5;
  --clay: #d97757;
  --clay-deep: #c6613f;
  --olive: #788c5d;
  --sky: #6a9bcc;
  --fig: #c46686;
  --radius: 12px;
  --radius-lg: 24px;
  --font-serif: "Songti SC", "Noto Serif SC", Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

a { color: var(--ink); }

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 249, 245, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hairline);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.02em;
}
.logo em { color: var(--clay); font-style: normal; }
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 14px;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--clay); }
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 18px;
  cursor: pointer;
  color: var(--ink);
}

/* ===== Hero ===== */
.hero { padding: 88px 0 64px; border-bottom: 1px solid var(--hairline); }
.hero .eyebrow {
  font-family: var(--font-sans);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 12px;
  color: var(--clay);
  margin-bottom: 20px;
}
.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(34px, 5.5vw, 60px);
  line-height: 1.25;
  font-weight: 700;
  max-width: 20em;
}
.hero .sub {
  margin-top: 24px;
  font-size: 18px;
  color: var(--muted);
  max-width: 42em;
}
.hero-actions { margin-top: 36px; display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: 15px;
  text-decoration: none;
  border-radius: 8px 8px 8px 2px;
  transition: background 0.2s, color 0.2s;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary { background: var(--clay); color: #fff; }
.btn-primary:hover { background: var(--clay-deep); }
.btn-ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--ink); color: var(--canvas); }
.hero-meta {
  margin-top: 40px;
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--secondary);
}
.hero-meta strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 26px;
  color: var(--ink);
}

/* ===== 通用区块 ===== */
.section { padding: 72px 0; border-bottom: 1px solid var(--hairline); }
.section-head { margin-bottom: 40px; }
.section-head .eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 12px;
  color: var(--clay);
  margin-bottom: 10px;
}
.section-head h2 {
  font-family: var(--font-serif);
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 700;
  line-height: 1.3;
}
.section-head p { margin-top: 12px; color: var(--muted); max-width: 46em; }

/* ===== 镜像列表 ===== */
.mirror-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}
.mirror-card {
  background: #fff;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s, transform 0.2s;
}
.mirror-card:hover { border-color: var(--clay); transform: translateY(-2px); }
.mirror-card .rank {
  font-family: var(--font-serif);
  font-size: 13px;
  color: var(--secondary);
}
.mirror-card .url {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 16px;
  font-weight: 600;
  word-break: break-all;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
.mirror-card .desc { font-size: 14px; color: var(--muted); flex: 1; }
.mirror-card .meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--secondary);
  border-top: 1px solid var(--surface);
  padding-top: 14px;
}
.tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
}
.tag-ok { background: rgba(120, 140, 93, 0.14); color: var(--olive); }
.tag-new { background: rgba(217, 119, 87, 0.14); color: var(--clay-deep); }
.mirror-card .visit {
  align-self: flex-start;
  font-size: 14px;
  color: var(--clay);
  text-decoration: none;
  border-bottom: 1px solid var(--clay);
  padding-bottom: 1px;
}
.mirror-card .visit:hover { color: var(--clay-deep); }

/* ===== 特点 ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}
.feature-item {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 28px;
}
.feature-item .icon {
  font-size: 24px;
  display: inline-block;
  margin-bottom: 14px;
}
.feature-item h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  margin-bottom: 8px;
}
.feature-item p { font-size: 14px; color: var(--muted); }

/* ===== 优劣与风险 ===== */
.pros-cons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.pc-card {
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 30px;
  background: #fff;
}
.pc-card h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  margin-bottom: 16px;
}
.pc-card.pros h3 { color: var(--olive); }
.pc-card.cons h3 { color: var(--clay-deep); }
.pc-card ul { list-style: none; }
.pc-card li {
  padding: 10px 0 10px 26px;
  position: relative;
  font-size: 15px;
  color: var(--ink-soft);
  border-bottom: 1px dashed var(--surface);
}
.pc-card li:last-child { border-bottom: none; }
.pc-card.pros li::before { content: "✓"; position: absolute; left: 0; color: var(--olive); }
.pc-card.cons li::before { content: "!"; position: absolute; left: 4px; color: var(--clay-deep); font-weight: 700; }

.risk-banner {
  margin-top: 24px;
  background: #fdf3ee;
  border: 1px solid rgba(217, 119, 87, 0.4);
  border-radius: var(--radius);
  padding: 22px 26px;
  font-size: 14px;
  color: var(--ink-soft);
}
.risk-banner strong { color: var(--clay-deep); }

/* ===== 使用指南 ===== */
.guide-steps { counter-reset: step; display: grid; gap: 0; }
.guide-step {
  display: flex;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--surface);
}
.guide-step:last-child { border-bottom: none; }
.guide-step .num {
  counter-increment: step;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border: 1px solid var(--hairline);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--clay);
}
.guide-step .num::before { content: counter(step); }
.guide-step h3 { font-family: var(--font-serif); font-size: 17px; margin-bottom: 6px; }
.guide-step p { font-size: 14px; color: var(--muted); }

/* ===== FAQ ===== */
.faq-list { display: grid; gap: 14px; }
.faq-item {
  background: #fff;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
}
.faq-item summary {
  cursor: pointer;
  padding: 20px 26px;
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  list-style: none;
  position: relative;
  padding-right: 56px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 26px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  color: var(--clay);
  transition: transform 0.2s;
}
.faq-item[open] summary::after { content: "−"; }
.faq-item .answer {
  padding: 0 26px 22px;
  font-size: 15px;
  color: var(--muted);
}
.faq-item .answer a { color: var(--clay); }

/* ===== 更新日志 ===== */
.changelog { list-style: none; border-left: 2px solid var(--hairline); padding-left: 28px; }
.changelog li { position: relative; padding-bottom: 26px; }
.changelog li::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--clay);
}
.changelog time {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 13px;
  color: var(--secondary);
  display: block;
  margin-bottom: 4px;
}
.changelog p { font-size: 15px; color: var(--ink-soft); }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--ink);
  color: #b0aea5;
  padding: 56px 0 40px;
  font-size: 14px;
}
.site-footer .footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.site-footer h4 {
  font-family: var(--font-serif);
  color: var(--canvas);
  font-size: 16px;
  margin-bottom: 14px;
}
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: #b0aea5; text-decoration: none; }
.site-footer a:hover { color: var(--canvas); }
.site-footer .copyright {
  border-top: 1px solid #3d3d3a;
  padding-top: 24px;
  font-size: 13px;
  color: #87867f;
}

/* ===== 跳转页 ===== */
.go-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
}
.go-card {
  max-width: 560px;
  width: 100%;
  background: #fff;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 44px 40px;
  text-align: center;
}
.go-card .go-icon { font-size: 40px; margin-bottom: 18px; }
.go-card h1 {
  font-family: var(--font-serif);
  font-size: 26px;
  margin-bottom: 14px;
}
.go-card .target-url {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 16px;
  font-weight: 600;
  background: var(--surface);
  border-radius: 8px;
  padding: 12px 18px;
  margin: 18px 0;
  word-break: break-all;
  color: var(--ink);
}
.go-card .go-risk {
  text-align: left;
  font-size: 13px;
  color: var(--muted);
  background: #fdf3ee;
  border: 1px solid rgba(217, 119, 87, 0.35);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 26px;
}
.go-card .go-risk strong { color: var(--clay-deep); }
.go-card .go-risk ul { margin: 8px 0 0 18px; }
.go-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.go-note { margin-top: 22px; font-size: 12px; color: var(--secondary); }
.go-countdown { color: var(--clay); font-weight: 700; }

/* ===== 响应式 ===== */
@media (max-width: 860px) {
  .pros-cons { grid-template-columns: 1fr; }
  .site-footer .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    flex-direction: column;
    gap: 0;
    padding: 8px 24px 16px;
  }
  .nav-links.open { display: flex; }
  .nav-links li { padding: 10px 0; border-bottom: 1px solid var(--surface); }
  .nav-links li:last-child { border-bottom: none; }
  .hero { padding: 56px 0 44px; }
  .section { padding: 52px 0; }
  .go-card { padding: 32px 24px; }
}