/**
 * Shadowrocket Swiss International Style (瑞士国际主义网格风格)
 * 严格对齐的栅格系统 · 黑白灰三色 + 瑞士红点缀 · Helvetica 字体
 */

:root {
  --bg-body: #ffffff;
  --bg-grid-line: #ebebeb;
  --bg-gray-light: #f7f7f7;
  --bg-gray-mid: #eeeeee;
  --bg-black: #000000;
  --bg-dark: #111111;

  --text-main: #000000;
  --text-sub: #222222;
  --text-dim: #555555;
  --text-muted: #888888;
  --text-inv: #ffffff;

  --swiss-red: #e60000;       /* 标志性瑞士红 */
  --swiss-red-hover: #cc0000;
  --swiss-red-subtle: rgba(230, 0, 0, 0.08);

  --border-line: #000000;
  --border-subtle: #e0e0e0;
  --border-grid: #dddddd;

  --font-swiss: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "Helvetica Neue Mono", "Courier New", Courier, monospace;

  --trans: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-body);
  color: var(--text-main);
}

body {
  font-family: var(--font-swiss);
  line-height: 1.5;
  background-color: var(--bg-body);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.skip {
  position: absolute;
  top: -999px;
  left: 20px;
  background: var(--bg-black);
  color: var(--text-inv);
  padding: 10px 18px;
  z-index: 9999;
  font-weight: 700;
}
.skip:focus {
  top: 20px;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}

/* 瑞士红标徽章 (Swiss Red Badge) */
.swiss-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: #ffffff;
  border: 1px solid var(--border-line);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 24px;
}
.swiss-red-dot {
  width: 8px;
  height: 8px;
  background: var(--swiss-red);
}

/* 按钮规范 (冷峻黑白与高纯度红) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  padding: 13px 26px;
  border: 1px solid var(--border-line);
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: var(--trans);
}

.btn-primary {
  background: var(--swiss-red);
  color: #ffffff;
  border-color: var(--swiss-red);
}
.btn-primary:hover {
  background: var(--swiss-red-hover);
  border-color: var(--swiss-red-hover);
  transform: translate(-2px, -2px);
  box-shadow: 2px 2px 0px #000000;
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-main);
  border-color: var(--border-line);
}
.btn-secondary:hover {
  background: #000000;
  color: #ffffff;
}

/* 标题样式 */
.grad-text {
  color: var(--text-main);
  position: relative;
}
.red-accent-text {
  color: var(--swiss-red);
}

/* 顶部导航 site-header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--border-line);
  height: 72px;
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: var(--text-main);
  text-transform: uppercase;
}
.brand-mark {
  width: 32px;
  height: 32px;
  background: var(--swiss-red);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 900;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}
.site-nav a {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: var(--trans);
}
.site-nav a:hover,
.site-nav a.is-on {
  color: var(--swiss-red);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-line);
  width: 40px;
  height: 40px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-main);
  position: relative;
  transition: var(--trans);
}
.nav-toggle span::before {
  content: "";
  position: absolute;
  top: -6px;
}
.nav-toggle span::after {
  content: "";
  position: absolute;
  top: 6px;
}

.nav-toggle.open span {
  background: transparent;
}
.nav-toggle.open span::before {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle.open span::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* 瑞士栅格通用章节规范 (Swiss Grid System) */
.section {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-grid);
}
.section-gray {
  background-color: var(--bg-gray-light);
}

.sec-head {
  margin-bottom: 48px;
}
.sec-index {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--swiss-red);
  letter-spacing: 1px;
  margin-bottom: 6px;
  display: block;
  text-transform: uppercase;
}
.sec-head h2 {
  font-size: 36px;
  font-weight: 900;
  letter-spacing: -1px;
  color: var(--text-main);
  margin-bottom: 12px;
  text-transform: uppercase;
  line-height: 1.15;
}
.sec-head p {
  font-size: 16px;
  color: var(--text-dim);
  max-width: 720px;
  line-height: 1.6;
}

/* Hero 主视觉 (左文右图双栏，瑞士栅格精确对齐) */
.hero-sec {
  padding: 72px 0 84px;
  border-bottom: 2px solid var(--border-line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-left h1 {
  font-size: 46px;
  line-height: 1.1;
  letter-spacing: -1.5px;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 20px;
  text-transform: uppercase;
}

.hero-left .lead {
  font-size: 17.5px;
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 30px;
}

.hero-checklist {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 20px;
  margin-bottom: 36px;
  border-top: 1px solid var(--border-grid);
  border-bottom: 1px solid var(--border-grid);
  padding: 20px 0;
}
.hero-checklist-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-sub);
}
.hero-checklist-item svg {
  width: 16px;
  height: 16px;
  stroke: var(--swiss-red);
  stroke-width: 3;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

.hero-platforms-hint {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
}
.hero-platforms-hint svg {
  width: 17px;
  height: 17px;
  fill: currentColor;
}

/* 客户端模拟窗口 (mock-window) */
.mock-window-wrap {
  position: relative;
}

.mock-window {
  background: #ffffff;
  border: 2px solid var(--border-line);
  box-shadow: 6px 6px 0px rgba(0, 0, 0, 0.08);
}

.mock-titlebar {
  background: #000000;
  color: #ffffff;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.mock-traffic-lights {
  display: flex;
  gap: 6px;
}
.mock-dot {
  width: 10px;
  height: 10px;
  background: #ffffff;
}
.mock-dot:first-child {
  background: var(--swiss-red);
}
.mock-win-title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.mock-body {
  padding: 24px;
}

.mock-card {
  background: var(--bg-gray-light);
  border: 1px solid var(--border-line);
  padding: 20px;
  margin-bottom: 18px;
}

.mock-status-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.mock-pill-active {
  background: var(--swiss-red);
  color: #ffffff;
  font-size: 11px;
  font-weight: 900;
  padding: 4px 10px;
  letter-spacing: 0.5px;
}

.mock-ping {
  font-family: var(--font-mono);
  font-size: 38px;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
}

.mock-chart {
  width: 100%;
  height: 54px;
  margin-top: 14px;
}

.mock-nodes {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.mock-node-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: #ffffff;
  border: 1px solid var(--border-grid);
  font-size: 13px;
  font-weight: 700;
}
.mock-node-item.active {
  border-color: var(--border-line);
  border-left: 4px solid var(--swiss-red);
}

/* 浮动卡片 */
.float-card {
  position: absolute;
  background: #ffffff;
  border: 2px solid var(--border-line);
  padding: 12px 18px;
  box-shadow: 4px 4px 0px rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 10;
}
.float-card-1 {
  top: -18px;
  right: -16px;
}
.float-card-2 {
  bottom: -18px;
  left: -16px;
}
.float-num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 900;
  color: var(--swiss-red);
}
.float-desc {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
}

/* 平台入口带 platform-strip */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--border-line);
  border-left: 1px solid var(--border-line);
}
.platform-card {
  background: #ffffff;
  border-right: 1px solid var(--border-line);
  border-bottom: 1px solid var(--border-line);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  transition: var(--trans);
}
.platform-card:hover {
  background: var(--bg-gray-light);
  transform: translateY(-2px);
}
.platform-card svg {
  width: 32px;
  height: 32px;
  fill: var(--text-main);
  margin-bottom: 20px;
}
.platform-card h3 {
  font-size: 17px;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 6px;
  text-transform: uppercase;
}
.platform-card .req {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 14px;
}
.platform-card .ver {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  color: var(--swiss-red);
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--border-grid);
}

/* 数据速览 stats-band */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 2px solid var(--border-line);
  border-bottom: 2px solid var(--border-line);
}
.stat-box {
  padding: 36px 24px;
  border-right: 1px solid var(--border-grid);
}
.stat-box:last-child {
  border-right: none;
}
.stat-num {
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -1.5px;
  margin-bottom: 4px;
}
.stat-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
}

/* 六大能力 feature-grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--border-line);
  border-left: 1px solid var(--border-line);
}
.feature-card {
  background: #ffffff;
  border-right: 1px solid var(--border-line);
  border-bottom: 1px solid var(--border-line);
  padding: 36px 30px;
  transition: var(--trans);
}
.feature-card:hover {
  background: var(--bg-gray-light);
}
.feature-index {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 900;
  color: var(--swiss-red);
  margin-bottom: 12px;
  display: block;
}
.feature-icon-wrap {
  width: 44px;
  height: 44px;
  border: 1px solid var(--border-line);
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.feature-icon-wrap svg {
  width: 22px;
  height: 22px;
  stroke: var(--text-main);
}
.feature-card h3 {
  font-size: 19px;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 12px;
  text-transform: uppercase;
}
.feature-card p {
  font-size: 14.5px;
  color: var(--text-dim);
  line-height: 1.65;
}

/* 工作原理 tech-grid */
.tech-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}
.tech-card {
  background: #ffffff;
  border: 2px solid var(--border-line);
  padding: 40px 36px;
}
.tech-card h3 {
  font-size: 22px;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 18px;
  text-transform: uppercase;
}
.tech-item {
  display: flex;
  gap: 18px;
  margin-top: 24px;
}
.tech-num {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 900;
  color: #ffffff;
  background: #000000;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.tech-item h4 {
  font-size: 16px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 6px;
}
.tech-item p {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.6;
}

/* 用户评价 review-grid */
.review-score-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border-line);
  padding-bottom: 24px;
}
.score-big {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 900;
  color: var(--text-main);
}
.star-row {
  display: flex;
  gap: 4px;
  color: var(--swiss-red);
}
.star-row svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.review-card {
  background: #ffffff;
  border: 1px solid var(--border-line);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
}
.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.avatar {
  width: 40px;
  height: 40px;
  background: #000000;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 14px;
}
.avatar.a1 { background: #000000; }
.avatar.a2 { background: var(--swiss-red); }
.avatar.a3 { background: #333333; }
.avatar.a4 { background: #555555; }

.user-info h4 {
  font-size: 14.5px;
  font-weight: 800;
  color: var(--text-main);
}
.user-info span {
  font-size: 12px;
  color: var(--text-dim);
}
.review-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.65;
  margin-bottom: 18px;
}
.review-meta {
  margin-top: auto;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--border-grid);
  padding-top: 10px;
}

/* 认证背书 trust-grid */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--border-line);
  border-left: 1px solid var(--border-line);
}
.trust-card {
  background: #ffffff;
  border-right: 1px solid var(--border-line);
  border-bottom: 1px solid var(--border-line);
  padding: 36px 24px;
  text-align: center;
}
.trust-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.trust-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--text-main);
}
.trust-card h4 {
  font-size: 16px;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 6px;
  text-transform: uppercase;
}
.trust-card p {
  font-size: 13px;
  color: var(--text-dim);
}

/* 对比表 cmp-table */
.cmp-table-wrap {
  border: 2px solid var(--border-line);
  overflow-x: auto;
  background: #ffffff;
}
.cmp-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14.5px;
}
.cmp-table th,
.cmp-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-grid);
  border-right: 1px solid var(--border-grid);
}
.cmp-table th {
  background: #000000;
  color: #ffffff;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.cmp-table th.hl,
.cmp-table td.hl {
  background: var(--swiss-red-subtle);
  font-weight: 700;
  color: var(--text-main);
  border-left: 2px solid var(--swiss-red);
  border-right: 2px solid var(--swiss-red);
}
.cmp-note {
  font-size: 12.5px;
  color: var(--text-muted);
  margin-top: 12px;
  text-align: right;
}

/* FAQ faq-list */
.faq-list {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border-line);
}
.faq-item {
  border-bottom: 1px solid var(--border-line);
  background: #ffffff;
  transition: var(--trans);
}
.faq-item.open {
  background: var(--bg-gray-light);
}
.faq-item button {
  width: 100%;
  padding: 22px 20px;
  background: none;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-align: left;
  font-size: 16px;
  font-weight: 800;
  color: var(--text-main);
  cursor: pointer;
}
.faq-item .ans {
  display: none;
  padding: 0 20px 24px;
  font-size: 14.5px;
  color: var(--text-dim);
  line-height: 1.7;
}
.faq-item.open .ans {
  display: block;
}

/* CTA 横幅 cta-band */
.cta-sec {
  background: #000000;
  color: #ffffff;
  padding: 88px 0;
  border-bottom: 2px solid var(--border-line);
}
.cta-sec h2 {
  font-size: 44px;
  font-weight: 900;
  letter-spacing: -1.5px;
  margin-bottom: 18px;
  color: #ffffff;
  text-transform: uppercase;
}
.cta-sec p {
  font-size: 17px;
  color: #aaaaaa;
  max-width: 680px;
  margin-bottom: 36px;
}
.cta-sec .btn-primary {
  background: var(--swiss-red);
  color: #ffffff;
  border-color: var(--swiss-red);
}
.cta-sec .btn-secondary {
  background: transparent;
  color: #ffffff;
  border-color: #ffffff;
}
.cta-sec .btn-secondary:hover {
  background: #ffffff;
  color: #000000;
}

/* 页脚 site-footer */
.site-footer {
  background: #ffffff;
  padding: 72px 0 36px;
  font-size: 14px;
}
.foot-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.foot-grid h3 {
  font-size: 14px;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 18px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.foot-grid a {
  display: block;
  color: var(--text-dim);
  margin-bottom: 10px;
  font-weight: 600;
  transition: var(--trans);
}
.foot-grid a:hover {
  color: var(--swiss-red);
}
.footer-seo {
  padding: 24px;
  background: var(--bg-gray-light);
  border: 1px solid var(--border-grid);
  margin-bottom: 32px;
  font-size: 12.5px;
  color: var(--text-dim);
  line-height: 1.85;
}
.copy {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--text-muted);
  font-size: 12.5px;
  font-weight: 600;
  padding-top: 24px;
  border-top: 1px solid var(--border-grid);
}

/* 响应式调整 */
@media (max-width: 1024px) {
  .platform-grid { grid-template-columns: repeat(3, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .hero-grid { grid-template-columns: 1fr; }
  .site-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #ffffff;
    border-bottom: 2px solid var(--border-line);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    display: none;
  }
  .site-nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .hero-checklist { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
  .float-card { display: none; }
  .hero-left h1 { font-size: 34px; }
  .cta-sec h2 { font-size: 32px; }
}