/* ============================================================
   drawio 中国官网 - 全局样式
   设计基调：扁平、现代、专业；以 logo 主色（暖橙 #ED8A3C）为视觉核心
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  /* 主色（取自 logo） */
  --color-primary: #ED8A3C;
  --color-primary-dark: #C97020;
  --color-primary-darker: #A5561A;
  --color-primary-light: #F9D5B0;
  --color-primary-soft: #FDF4EA;

  /* 中性色 */
  --color-bg: #FFFFFF;
  --color-bg-alt: #FAFBFC;
  --color-bg-soft: #F5F7FA;
  --color-text: #1A202C;
  --color-text-secondary: #4A5568;
  --color-text-tertiary: #718096;
  --color-border: #E2E8F0;
  --color-border-strong: #CBD5E0;
  --color-dark: #1A202C;
  --color-dark-soft: #2D3748;

  /* 语义色 */
  --color-success: #38A169;
  --color-info: #3182CE;
  --color-warn: #D69E2E;

  /* 字体栈（中文优先微软雅黑/苹方降级到系统字体） */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* 阴影（克制柔和） */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 1px rgba(15, 23, 42, 0.03);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06), 0 2px 4px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 24px 56px rgba(15, 23, 42, 0.12);
  --shadow-orange: 0 8px 24px rgba(237, 138, 60, 0.25);

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;

  /* 容器 */
  --container-max: 1200px;
  --container-padding: 24px;

  /* 过渡 */
  --t-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --t-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --t-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* z-index */
  --z-header: 100;
  --z-modal: 1000;
  --z-tooltip: 1100;
}

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

.hidden {
  display: none !important;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

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

a {
  color: var(--color-primary-dark);
  text-decoration: none;
  transition: color var(--t-fast);
}

a:hover, a:focus-visible {
  color: var(--color-primary-darker);
}

a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

button {
  font-family: inherit;
  cursor: pointer;
}

ul, ol {
  padding: 0;
  margin: 0;
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

p {
  margin: 0 0 1rem 0;
}

p:last-child {
  margin-bottom: 0;
}

/* ---------- 通用容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: 80px 0;
}

.section-tight {
  padding: 56px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 48px;
}

.section-title .eyebrow {
  display: inline-block;
  padding: 6px 14px;
  background: var(--color-primary-soft);
  color: var(--color-primary-darker);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-pill);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title h2 {
  margin-bottom: 12px;
}

.section-title p {
  color: var(--color-text-secondary);
  font-size: 1.0625rem;
  max-width: 640px;
  margin: 0 auto;
}

/* ---------- 按钮系统 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--t-base);
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background: var(--color-primary);
  color: #FFFFFF;
  box-shadow: var(--shadow-orange);
}

.btn-primary:hover, .btn-primary:focus-visible {
  background: var(--color-primary-dark);
  color: #FFFFFF;
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(237, 138, 60, 0.32);
}

.btn-dark {
  background: var(--color-dark);
  color: #FFFFFF;
}

.btn-dark:hover, .btn-dark:focus-visible {
  background: #000000;
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.btn-outline:hover, .btn-outline:focus-visible {
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
  background: var(--color-primary-soft);
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary-dark);
}

.btn-ghost:hover {
  background: var(--color-primary-soft);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 16px;
}

.btn-sm {
  padding: 10px 18px;
  font-size: 13px;
}

.btn-block {
  width: 100%;
}

/* ---------- 导航栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--color-border);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.01em;
}

.brand-mark {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.brand-name {
  font-size: 19px;
}

.brand-name .dot {
  color: var(--color-primary);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-list a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--t-fast);
}

.nav-list a:hover, .nav-list a.active {
  color: var(--color-primary-dark);
  background: var(--color-primary-soft);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  padding: 8px;
  border-radius: var(--radius-sm);
  color: var(--color-text);
}

.nav-toggle:hover {
  background: var(--color-bg-soft);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 96px 0 80px;
  background:
    radial-gradient(1200px 600px at 10% -20%, rgba(237, 138, 60, 0.10), transparent 60%),
    radial-gradient(900px 500px at 90% 0%, rgba(237, 138, 60, 0.06), transparent 70%),
    linear-gradient(180deg, #FFFFFF 0%, #FDF6EE 100%);
  overflow: hidden;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--color-success);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 0 4px rgba(56, 161, 105, 0.15);
}

.hero h1 {
  font-size: clamp(2.25rem, 4.6vw, 3.5rem);
  margin-bottom: 20px;
}

.hero h1 .accent {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 540px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.hero-meta {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  color: var(--color-text-tertiary);
  font-size: 13.5px;
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-meta .check {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--color-success);
}

.hero-visual {
  position: relative;
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
  padding: 24px;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(237, 138, 60, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.editor-mock {
  position: relative;
  width: 100%;
  height: 100%;
  background: #FAFBFC;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
  display: flex;
}

.editor-mock-sidebar {
  width: 88px;
  background: #F1F4F8;
  border-right: 1px solid var(--color-border);
  padding: 16px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.editor-mock-shape {
  width: 56px;
  height: 40px;
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.editor-mock-canvas {
  flex: 1;
  position: relative;
  background:
    radial-gradient(circle at 1px 1px, rgba(15, 23, 42, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
}

.editor-mock-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.editor-mock-topbar {
  position: absolute;
  top: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  gap: 6px;
  align-items: center;
  background: #FFFFFF;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  z-index: 2;
}

.editor-mock-topbar .pill {
  height: 8px;
  width: 40px;
  background: var(--color-bg-soft);
  border-radius: 4px;
}

.editor-mock-topbar .pill.long { width: 72px; }
.editor-mock-topbar .pill.orange { background: var(--color-primary); width: 56px; }

/* ---------- 特性卡片 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--t-base);
}

.feature-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-orange);
  transform: translateY(-2px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-soft);
  color: var(--color-primary-darker);
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-card h3 {
  font-size: 1.0625rem;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 14.5px;
  line-height: 1.65;
}

/* ---------- 使用场景 ---------- */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.scenario-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all var(--t-base);
}

.scenario-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.scenario-thumb {
  width: 100%;
  aspect-ratio: 16/10;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #FDF4EA, #FFFFFF);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.scenario-thumb svg {
  width: 100%;
  height: 100%;
}

.scenario-card h3 {
  font-size: 1.0625rem;
}

.scenario-card p {
  font-size: 13.5px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.scenario-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.scenario-tags span {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: var(--color-bg-soft);
  color: var(--color-text-tertiary);
}

/* ---------- 用户评价 ---------- */
.testimonial-section {
  background: var(--color-bg-alt);
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: relative;
}

.testimonial-quote {
  color: var(--color-text-secondary);
  font-size: 14.5px;
  line-height: 1.7;
  position: relative;
  padding-left: 20px;
}

.testimonial-quote::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 12px;
  width: 3px;
  background: var(--color-primary);
  border-radius: 3px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: auto;
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  flex-shrink: 0;
}

.testimonial-avatar svg {
  width: 22px;
  height: 22px;
}

.testimonial-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.testimonial-name {
  font-weight: 600;
  font-size: 14px;
  color: var(--color-text);
}

.testimonial-role {
  font-size: 12.5px;
  color: var(--color-text-tertiary);
}

.testimonial-stars {
  color: var(--color-primary);
  font-size: 14px;
  letter-spacing: 2px;
}

/* ---------- 数据条 ---------- */
.stats {
  background: var(--color-dark);
  color: #FFFFFF;
  padding: 56px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stats-item .num {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.stats-item .label {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

/* ---------- 下载选择 ---------- */
.download-section {
  background: linear-gradient(180deg, #FFFFFF 0%, var(--color-primary-soft) 100%);
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.download-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all var(--t-base);
}

.download-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.download-card .platform-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--color-primary-soft);
  color: var(--color-primary-darker);
  display: flex;
  align-items: center;
  justify-content: center;
}

.download-card .platform-icon svg {
  width: 32px;
  height: 32px;
  fill: currentColor;
}

.download-card h3 {
  font-size: 1.125rem;
  margin: 0;
}

.download-card p {
  color: var(--color-text-secondary);
  font-size: 13.5px;
}

.download-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-tertiary);
  border-top: 1px dashed var(--color-border);
  padding-top: 14px;
}

/* ---------- 表格 ---------- */
.fancy-table {
  width: 100%;
  border-collapse: collapse;
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  font-size: 14.5px;
}

.fancy-table th, .fancy-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.fancy-table th {
  background: var(--color-bg-soft);
  font-weight: 600;
  color: var(--color-text);
  font-size: 13.5px;
  letter-spacing: 0.02em;
}

.fancy-table tr:last-child td {
  border-bottom: 0;
}

.fancy-table code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--color-bg-soft);
  padding: 2px 8px;
  border-radius: 4px;
  color: var(--color-text-secondary);
  word-break: break-all;
}

.fancy-table .num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* ---------- FAQ ---------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: 0;
  text-align: left;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-question .icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  color: var(--color-primary-dark);
  transition: transform var(--t-base);
}

.faq-item.open .faq-question .icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--t-slow);
}

.faq-item.open .faq-answer {
  max-height: 600px;
}

.faq-answer-inner {
  padding: 0 24px 22px;
  color: var(--color-text-secondary);
  font-size: 14.5px;
  line-height: 1.7;
}

/* ---------- 内容页通用布局 ---------- */
.page-hero {
  padding: 80px 0 56px;
  background:
    radial-gradient(1000px 500px at 50% -10%, rgba(237, 138, 60, 0.10), transparent 60%),
    linear-gradient(180deg, #FFFFFF 0%, #FDF6EE 100%);
  text-align: center;
}

.page-hero h1 {
  margin-bottom: 16px;
}

.page-hero p {
  max-width: 720px;
  margin: 0 auto;
  color: var(--color-text-secondary);
  font-size: 1.0625rem;
}

.breadcrumb {
  font-size: 13px;
  color: var(--color-text-tertiary);
  margin-bottom: 16px;
}

.breadcrumb a {
  color: var(--color-text-tertiary);
}

.breadcrumb a:hover {
  color: var(--color-primary-dark);
}

.breadcrumb .sep {
  margin: 0 8px;
  color: var(--color-border-strong);
}

/* ---------- Timeline ---------- */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 28px;
  max-width: 800px;
  margin: 0 auto;
}

.timeline-item {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 28px;
  align-items: start;
}

.timeline-year {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  letter-spacing: -0.02em;
}

.timeline-body {
  border-left: 2px solid var(--color-primary-light);
  padding-left: 24px;
  padding-bottom: 4px;
}

.timeline-body h3 {
  font-size: 1.0625rem;
  margin-bottom: 6px;
}

.timeline-body p {
  color: var(--color-text-secondary);
  font-size: 14.5px;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 32px;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 13.5px;
  transition: color var(--t-fast);
}

.footer-col a:hover {
  color: var(--color-primary);
}

.footer-about p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 13.5px;
  line-height: 1.7;
  margin-top: 12px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #FFFFFF;
  font-weight: 800;
  font-size: 18px;
}

.footer-brand .dot {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a:hover {
  color: var(--color-primary);
}

/* ---------- 下载弹窗 ---------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-base);
}

.modal-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
}
button { outline: none } 
.modal {
  width: 100%;
  max-width: 720px;
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  padding: 36px;
  box-shadow: var(--shadow-xl);
  transform: scale(0.96) translateY(8px);
  transition: transform var(--t-base);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-backdrop.is-open .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}

.modal-title {
  font-size: 1.5rem;
  margin: 0;
}

.modal-sub {
  font-size: 14px;
  color: var(--color-text-tertiary);
  margin-top: 4px;
}

.modal-close {
  background: transparent;
  border: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: var(--color-text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.modal-close:hover {
  background: var(--color-bg-soft);
  color: var(--color-text);
}

.modal-close svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

.modal-platform-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 12px;
}

.modal-tab {
  padding: 8px 16px;
  background: transparent;
  border: 0;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.modal-tab.is-active {
  background: var(--color-primary-soft);
  color: var(--color-primary-darker);
}

.modal-tab svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.modal-body {
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: stretch;
}

.modal-download-info {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.modal-download-info .label {
  font-size: 13px;
  color: var(--color-text-tertiary);
  margin-bottom: 4px;
}

.modal-download-info .filename {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--color-bg-soft);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  word-break: break-all;
}

.modal-meta-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  font-size: 13px;
}

.modal-meta-row .meta-cell .label {
  color: var(--color-text-tertiary);
  font-size: 12px;
  margin-bottom: 2px;
}

.modal-meta-row .meta-cell .value {
  font-weight: 600;
  color: var(--color-text);
}

.modal-download-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 8px;
}

.modal-qrcode-area {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.qrcode-row {
  display: grid;
  justify-content: space-between;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.qrcode-card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 12px 12px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.qrcode-card img {
  width: 100%;
  max-width: 170px;
  aspect-ratio: 1 / 1;
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px;
}

.qrcode-card .label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
}

.qrcode-card .hint {
  font-size: 11.5px;
  color: var(--color-text-tertiary);
}

.modal-footnote {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--color-border);
  font-size: 12.5px;
  color: var(--color-text-tertiary);
  line-height: 1.65;
}

.modal-footnote code {
  font-family: var(--font-mono);
  font-size: 11.5px;
  background: var(--color-bg-soft);
  padding: 1px 6px;
  border-radius: 4px;
}

/* ---------- CTA / Banner ---------- */
.cta-banner {
  background:
    linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #FFFFFF;
  padding: 64px 0;
  text-align: center;
}

.cta-banner h2 {
  color: #FFFFFF;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: 14px;
}

.cta-banner p {
  max-width: 600px;
  margin: 0 auto 28px;
  font-size: 1.0625rem;
  color: rgba(255, 255, 255, 0.92);
}

.cta-banner .btn-primary {
  background: #FFFFFF;
  color: var(--color-primary-darker);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}

.cta-banner .btn-primary:hover {
  background: #FFFFFF;
  color: var(--color-primary-dark);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.22);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .feature-grid,
  .testimonial-grid,
  .download-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .scenario-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px 24px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-visual {
    aspect-ratio: 16 / 11;
    max-width: 640px;
    margin: 0 auto;
  }
}

@media (max-width: 720px) {
  .section { padding: 56px 0; }
  .section-tight { padding: 40px 0; }
  .hero { padding: 64px 0 56px; }

  .nav-list, .nav-cta .btn-ghost {
    display: none;
  }
  .nav-toggle { display: inline-flex; }

  /* 移动端菜单展开 */
  .nav-open .nav-list {
    display: flex;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: #FFFFFF;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: 12px 16px 16px;
  }
  .nav-open .nav-list a {
    width: 100%;
    padding: 12px 14px;
  }

  .feature-grid,
  .testimonial-grid,
  .download-grid,
  .scenario-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .modal-body {
    grid-template-columns: 1fr;
  }
  .qrcode-row {
    grid-template-columns: 1fr 1fr;
  }
  .modal {
    padding: 24px 20px;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .timeline-body {
    border-left: 0;
    padding-left: 0;
    border-top: 2px solid var(--color-primary-light);
    padding-top: 14px;
  }

  .fancy-table {
    font-size: 13px;
  }
  .fancy-table th, .fancy-table td {
    padding: 12px 14px;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- 打印样式 ---------- */
@media print {
  .site-header, .site-footer, .modal-backdrop, .nav-cta, .hero-actions {
    display: none !important;
  }
  body { color: #000; background: #FFFFFF; }
  a { color: inherit; text-decoration: underline; }
}