/* ============================================================
   RAW 选片匹配工具 · 官网静态站样式
   设计语言对齐 docs/说明图样式框架与制作流程.md（深色科技感）
   蓝绿黄三色重点强调；纯 CSS，无外部依赖。
   ============================================================ */

:root {
  /* 配色（与说明图框架一致） */
  --bg: #0b1020;
  --card: #121a2c;
  --card-border: #1d2840;
  --divider: #223152;
  --blue: #438bff;
  --blue-grad1: #79b5ff;
  --blue-grad2: #2f7df0;
  --green: #4ed59a;
  --yellow: #ffc563;
  --text: #f1f5fb;
  --text-sub: #aab8ce;

  --radius: 18px;
  --radius-sm: 14px;
  --maxw: 1080px;
  --font: 'PingFang SC', 'Helvetica Neue', 'Microsoft YaHei', Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 16, 32, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--divider);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 18px;
  color: var(--text);
  white-space: nowrap;
}
.brand:hover { text-decoration: none; }
.logo-square {
  width: 40px; height: 40px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--blue-grad1), var(--blue-grad2));
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.nav-links {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 22px;
}
.nav-links a {
  color: var(--text-sub);
  font-size: 15px;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-cta { margin-left: 8px; }
.nav-toggle {
  display: none;
  margin-left: auto;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  color: var(--text);
  width: 40px; height: 40px;
  font-size: 18px;
  cursor: pointer;
}

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .08s ease, opacity .15s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--blue);
  color: #fff;
}
.btn-primary:hover { text-decoration: none; opacity: .92; color: #fff; }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--card-border);
}
.btn-ghost:hover { text-decoration: none; border-color: var(--blue); color: var(--blue); }
.btn-green {
  background: var(--green);
  color: #062018;
}
.btn-green:hover { text-decoration: none; opacity: .92; color: #062018; }

/* ---------- 徽章 ---------- */
.badge {
  display: inline-block;
  border: 2px solid var(--blue);
  border-radius: 22px;
  padding: 4px 16px;
  color: var(--blue);
  font-weight: 600;
  font-size: 15px;
}
.badge-yellow { border-color: var(--yellow); color: var(--yellow); }
.badge-green { border-color: var(--green); color: var(--green); }

/* ---------- 区块标题 ---------- */
.section { padding: 72px 0; border-bottom: 1px solid var(--divider); }
.section:last-of-type { border-bottom: none; }
.eyebrow {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--text-sub);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-title {
  font-size: 32px;
  font-weight: 600;
  margin: 0 0 8px;
  color: var(--text);
}
.section-sub {
  font-size: 17px;
  color: var(--text-sub);
  margin: 0 0 36px;
  max-width: 720px;
}

/* ---------- 卡片 ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 26px 28px;
}
.card + .card { margin-top: 18px; }
/* grid 内卡片需等高等宽，清除竖排用的上边距 */
.grid .card + .card { margin-top: 0; }
.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

/* 亮点卡（绿） */
.card-highlight {
  background: rgba(78, 213, 154, 0.08);
  border: 2px solid var(--green);
  border-radius: var(--radius);
  padding: 26px 28px;
}
.card-highlight .card-head {
  color: var(--green);
  font-size: 21px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
/* 警示卡（黄） */
.card-warn {
  background: rgba(255, 197, 99, 0.08);
  border: 1.5px solid rgba(255, 197, 99, 0.45);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.7;
}

/* ---------- 品牌方块（hero / section head 复用） ---------- */
.brand-block {
  display: flex;
  align-items: center;
  gap: 22px;
  padding-bottom: 22px;
  border-bottom: 1.5px solid var(--divider);
}
.brand-block .logo-big {
  width: 80px; height: 80px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--blue-grad1), var(--blue-grad2));
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.brand-block .title { font-size: 40px; font-weight: 600; line-height: 1.2; }
.brand-block .subtitle { font-size: 19px; color: var(--text-sub); margin-top: 6px; }

/* ---------- Hero ---------- */
.hero { padding: 64px 0 56px; }
.hero-flex {
  display: flex;
  flex-direction: column;
  gap: 28px;
  align-items: flex-start;
}
.hero-text { max-width: 820px; }
.hero h1 {
  font-size: 46px;
  line-height: 1.16;
  margin: 18px 0 12px;
  font-weight: 600;
}
.hero .lead {
  font-size: 19px;
  color: var(--text-sub);
  margin: 0 0 30px;
  max-width: 720px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- 核心价值卡 ---------- */
.value-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px 26px;
}
.value-icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
}
.value-card h3 { margin: 0 0 8px; font-size: 19px; font-weight: 600; color: var(--text); }
.value-card p { margin: 0; font-size: 15px; color: var(--text-sub); line-height: 1.7; }
.value-card ul { margin: 12px 0 0; padding-left: 18px; color: var(--text-sub); font-size: 14px; line-height: 1.7; }
.value-card ul li b { color: var(--text); font-weight: 600; }

/* ---------- 步骤 ---------- */
.step-row {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 16px;
  align-items: start;
  padding: 18px 0;
  border-bottom: 1px solid var(--card-border);
}
.step-row:last-child { border-bottom: none; }
.step-num {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  text-align: center;
  line-height: 32px;
  font-weight: 600;
  font-size: 16px;
}
.step-num.warn { background: var(--yellow); color: #0b1020; }
.step-body { font-size: 16px; line-height: 1.6; }
.step-body b { color: var(--text); }
.step-body .muted { color: var(--text-sub); }

/* ---------- chip 标签 ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.chip {
  background: var(--bg);
  border: 1px solid var(--blue);
  color: var(--blue);
  padding: 7px 16px;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 500;
}

/* ---------- 授权方案 ---------- */
.lic-row {
  display: grid;
  grid-template-columns: 6px 1fr;
  gap: 14px;
  font-size: 16px;
  line-height: 1.7;
  padding: 14px 0;
  border-bottom: 1px solid var(--card-border);
}
.lic-row:last-child { border-bottom: none; }
.lic-bar-green { background: var(--green); border-radius: 2px; }
.lic-bar-blue { background: var(--blue); border-radius: 2px; }

/* ---------- 下载区 ---------- */
.dl-latest {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: stretch;
  margin-bottom: 40px;
}
.dl-card {
  flex: 1 1 320px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 26px 28px;
  display: flex;
  flex-direction: column;
}
.dl-card .platform { font-size: 15px; color: var(--text-sub); margin-bottom: 6px; }
.dl-card .ver { font-size: 26px; font-weight: 600; margin-bottom: 4px; }
.dl-card .date { font-size: 14px; color: var(--text-sub); margin-bottom: 20px; }
.dl-card .btn { margin-top: auto; width: 100%; }

.version-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--card-border);
}
.version-table th, .version-table td {
  text-align: left;
  padding: 14px 18px;
  border-bottom: 1px solid var(--card-border);
}
.version-table th { background: var(--card); color: var(--text-sub); font-weight: 600; font-size: 14px; }
.version-table tr:last-child td { border-bottom: none; }
.version-table td .tag {
  display: inline-block;
  font-size: 12px;
  padding: 2px 9px;
  border-radius: 8px;
  font-weight: 600;
  margin-right: 6px;
}
.tag-feat { background: rgba(67,139,255,.15); color: var(--blue); }
.tag-fix { background: rgba(78,213,154,.15); color: var(--green); }
.tag-chore { background: rgba(255,197,99,.15); color: var(--yellow); }
.version-table a { font-weight: 600; }

/* ---------- FAQ ---------- */
.faq-item {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 14px;
}
.faq-item .q { font-size: 17px; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.faq-item .a { font-size: 15px; color: var(--text-sub); line-height: 1.7; }

/* ---------- 代码片段 ---------- */
code.inline {
  background: var(--bg);
  padding: 2px 7px;
  border-radius: 5px;
  color: var(--green);
  font-size: 13px;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
}

/* ---------- 页脚 ---------- */
.footer {
  padding: 40px 0;
  text-align: center;
  color: var(--text-sub);
  font-size: 14px;
  border-top: 1px solid var(--divider);
}
.footer a { color: var(--text-sub); margin: 0 10px; }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .hero-flex { flex-direction: column; }
  .hero-visual { flex: none; max-width: 280px; width: 100%; align-self: center; }
  .hero h1 { font-size: 34px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .brand-block .title { font-size: 30px; }
  .section-title { font-size: 26px; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--divider);
    padding: 8px 24px 16px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 0; border-bottom: 1px solid var(--card-border); }
  .nav-links .nav-cta { margin: 12px 0 0; }
  .nav-toggle { display: block; }
}

/* ---------- 使用流程卡片化 ---------- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.step-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 26px 24px;
}
.step-card .step-num { margin-bottom: 14px; }
.step-card h3 { margin: 0 0 10px; font-size: 18px; font-weight: 600; color: var(--text); }
.step-card p { margin: 0; font-size: 14px; color: var(--text-sub); line-height: 1.7; }

/* ---------- 联系作者 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 540px;
  margin: 0 auto;
}
.qr-img {
  width: 100%;
  max-width: 240px;
  aspect-ratio: 3 / 4;
  object-fit: contain;
  background: #fff;
  border-radius: 14px;
  display: block;
  margin: 0 auto;
}
.buy-note {
  max-width: 680px;
  margin: 28px auto 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-sub);
  background: var(--bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 16px 20px;
}
.buy-note b { color: var(--text); }

/* ---------- 购买与激活 ---------- */
.buyflow-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 30px;
}
.buyflow-grid .step-card .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 14px;
}
.buy-logic {
  max-width: 820px;
  margin: 0 auto;
  background: var(--bg);
  border: 1px solid var(--card-border);
  border-left: 3px solid var(--green);
  border-radius: 14px;
  padding: 22px 26px;
}
.buy-logic-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}
.buy-logic-list {
  margin: 0;
  padding-left: 20px;
}
.buy-logic-list li {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-sub);
  margin-bottom: 8px;
}
.buy-logic-list li b { color: var(--text); }

/* ---------- 定价 ---------- */
.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.price-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 18px;
  padding: 28px 24px;
  display: flex; flex-direction: column;
}
.price-card.price-hot {
  border-color: rgba(67,139,255,.6);
  box-shadow: 0 18px 50px rgba(67,139,255,.18);
}
.price-flag {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(180deg,#5a9bff,var(--blue));
  color:#fff; font-size: 12px; font-weight: 700;
  padding: 5px 14px; border-radius: 999px; white-space: nowrap;
}
.price-name { font-size: 16px; color: var(--text-sub); font-weight: 600; }
.price-amt { font-size: 40px; font-weight: 700; color: var(--text); margin: 10px 0 2px; line-height: 1; }
.price-unit { font-size: 15px; font-weight: 500; color: var(--text-sub); }
.price-per { font-size: 13px; color: var(--text-sub); margin-bottom: 18px; }
.price-feats { list-style: none; padding: 0; margin: 0 0 22px; flex: 1; }
.price-feats li {
  font-size: 14px; color: var(--text); padding: 8px 0 8px 24px; position: relative;
  border-bottom: 1px solid var(--card-border);
}
.price-feats li::before {
  content: "✓"; position: absolute; left: 0; top: 8px;
  color: var(--green); font-weight: 700;
}
.price-card .btn { width: 100%; justify-content: center; }

@media (max-width: 880px) {
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .price-grid { grid-template-columns: 1fr; }
  .buyflow-grid { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .steps-grid { grid-template-columns: 1fr; }
}