@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&display=swap');

/* ===========================
   CSS 自定义属性
   =========================== */
:root {
  --color-bg: #ffffff;
  --color-surface: #f5f5f5;
  --color-ink: #1f1f1f;
  --color-ink-muted: #555555;
  --color-ink-faint: #999999;
  --color-border: #e0e0e0;
  --color-accent: #1f1f1f;
  --color-accent-hover: #333333;
  --color-cta: #1f1f1f;
  --color-cta-text: #ffffff;
  --radius-card: 28px;
  --radius-sm: 12px;
  --radius-btn: 8px;
  --shadow-card: 0 4px 16px rgba(0,0,0,0.07), 0 1px 4px rgba(0,0,0,0.04);
  --shadow-hover: 0 8px 32px rgba(0,0,0,0.12), 0 2px 8px rgba(0,0,0,0.06);
  --font-main: 'Space Mono', 'Courier New', monospace;
  --font-body: 'Space Mono', monospace;
  --transition-base: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  --nav-height: 64px;
  --content-max: 1200px;
  --sidebar-w: 220px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-ink);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

/* ===========================
   排版
   =========================== */
h1, h2, h3, h4, h5 {
  font-family: var(--font-main);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}

h1 { font-size: clamp(1.75rem, 4vw, 3rem); }
h2 { font-size: clamp(1.25rem, 2.5vw, 2rem); margin-bottom: 0.5em; }
h3 { font-size: clamp(1rem, 1.8vw, 1.35rem); }
h4 { font-size: 1rem; font-weight: 700; }

p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-ink-muted);
}

.subtitle, p.subtitle, p.subhead, p.desc, p.lead {
  font-size: 1.05rem;
  color: var(--color-ink-muted);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

/* ===========================
   布局包裹
   =========================== */
.site-wrap {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ===========================
   导航 aside > nav > ul > li > a
   =========================== */
.site-aside {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  padding: 0 24px;
  max-width: var(--content-max);
  margin: 0 auto;
  width: 100%;
}

.nav-brand-center {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.brand-link {
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: var(--color-ink);
  white-space: nowrap;
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
}

/* 汉堡按钮 */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  min-height: 44px;
  min-width: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-btn);
  transition: background var(--transition-base);
  position: relative;
  z-index: 200;
}

.hamburger:hover {
  background: var(--color-surface);
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: translateX(-8px);
}
.hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.nav-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  background: var(--color-cta);
  color: var(--color-cta-text);
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: var(--radius-btn);
  transition: background var(--transition-base), transform var(--transition-base);
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

/* 全屏遮罩菜单 */
.fullscreen-menu {
  position: fixed;
  inset: 0;
  background: var(--color-ink);
  z-index: 150;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.fullscreen-menu[aria-hidden="false"] {
  opacity: 1;
  pointer-events: all;
}

.fullscreen-menu ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: center;
  max-height: 80vh;
  overflow-y: auto;
  padding: 0 24px;
  width: 100%;
  max-width: 600px;
}

.fullscreen-menu li a {
  display: block;
  font-family: var(--font-main);
  font-weight: 700;
  font-size: clamp(0.9rem, 2.5vw, 1.1rem);
  color: var(--color-bg);
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-base), color var(--transition-base);
  min-height: 44px;
  line-height: 1.4;
}

.fullscreen-menu li a:hover {
  background: rgba(255,255,255,0.12);
  color: #ffffff;
}

.menu-close {
  position: absolute;
  top: 20px;
  right: 24px;
  color: var(--color-bg);
  font-size: 1.5rem;
  padding: 10px;
  min-height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-btn);
  transition: background var(--transition-base);
}

.menu-close:hover {
  background: rgba(255,255,255,0.15);
}

/* ===========================
   Hero（首页）
   =========================== */
.hero-section {
  min-height: 100vh;
  padding-top: var(--nav-height);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--color-bg);
}

.hero-bg-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-main);
  font-weight: 700;
  font-size: clamp(8rem, 20vw, 22rem);
  color: var(--color-surface);
  letter-spacing: -0.05em;
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 80px 48px;
  max-width: var(--content-max);
  margin: 0 auto;
  width: 100%;
}

.hero-text {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero-eyebrow {
  font-family: var(--font-main);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  border-left: 3px solid var(--color-ink);
  padding-left: 12px;
}

.hero-text h1 {
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  line-height: 1.15;
}

.hero-lead {
  font-size: 1.1rem;
  color: var(--color-ink-muted);
  line-height: 1.7;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* 仪表盘卡片组 */
.hero-dashboard {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-auto-rows: 140px;
  gap: 16px;
}

.dash-tile {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.dash-tile:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-hover);
}

.dash-tile-lg {
  grid-row: span 2;
}

.dash-tile-wide {
  grid-column: span 2;
}

.dash-num {
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 2rem;
  color: var(--color-ink);
  line-height: 1;
}

.dash-num small {
  font-size: 0.9rem;
}

.dash-label {
  font-size: 0.8rem;
  color: var(--color-ink-muted);
  font-family: var(--font-main);
  letter-spacing: 0.05em;
}

/* ===========================
   按钮
   =========================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 28px;
  background: var(--color-cta);
  color: var(--color-cta-text);
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: var(--radius-btn);
  transition: background var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.btn-primary:hover {
  background: #333;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.18);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 28px;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: var(--radius-btn);
  border: 1.5px solid var(--color-border);
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-secondary:hover {
  background: var(--color-ink);
  color: var(--color-bg);
  border-color: var(--color-ink);
  transform: translateY(-2px);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 24px;
  background: transparent;
  color: var(--color-ink);
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: var(--radius-btn);
  border: 1.5px solid var(--color-ink);
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-outline:hover {
  background: var(--color-ink);
  color: var(--color-bg);
}

.btn-sm {
  min-height: 40px;
  padding: 0 18px;
  font-size: 0.82rem;
}

/* ===========================
   正文主容器 main > article > div
   =========================== */
.main-content {
  padding-top: calc(var(--nav-height) + 32px);
  flex: 1;
}

.content-article {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px 64px;
  width: 100%;
}

.content-section {
  margin-bottom: 64px;
}

.page-content-section {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--color-ink);
}

.page-content-section h2 {
  margin-top: 2em;
  margin-bottom: 0.6em;
}

.page-content-section h3 {
  margin-top: 1.5em;
  margin-bottom: 0.4em;
}

.page-content-section p {
  margin-bottom: 1em;
  color: var(--color-ink);
}

.page-content-section ul,
.page-content-section ol {
  list-style: disc;
  padding-left: 1.5em;
  margin-bottom: 1em;
}

.page-content-section li {
  margin-bottom: 0.4em;
  color: var(--color-ink);
}

.page-content-section a {
  color: var(--color-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-content-section time {
  font-family: var(--font-main);
  font-size: 0.85rem;
  color: var(--color-ink-muted);
}

/* ===========================
   Bento 网格
   =========================== */
.bento-section {
  margin-bottom: 80px;
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 200px;
  gap: 16px;
  margin-top: 32px;
}

.bento-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.bento-card:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-hover);
}

.card-wide { grid-column: span 2; }
.card-tall { grid-row: span 2; }

.card-highlight {
  background: var(--color-ink);
  grid-column: span 2;
}

.card-highlight .card-title,
.card-highlight .card-index {
  color: var(--color-bg);
}

.card-highlight .card-desc {
  color: rgba(255,255,255,0.7);
}

.card-highlight .card-link {
  color: rgba(255,255,255,0.9);
}

.card-inner {
  padding: 28px;
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card-index {
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  text-transform: uppercase;
}

.card-title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.3;
  flex: 1;
}

.card-desc {
  font-size: 0.85rem;
  color: var(--color-ink-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-link {
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.82rem;
  color: var(--color-ink);
  letter-spacing: 0.03em;
  transition: opacity var(--transition-base);
}

.card-link:hover {
  opacity: 0.6;
}

/* ===========================
   快速通道导航
   =========================== */
.quick-nav-section {
  margin-bottom: 64px;
}

.quick-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.quick-nav-item {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 12px 16px;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-ink);
  text-align: center;
  border: 1.5px solid transparent;
  transition: all var(--transition-base);
}

.quick-nav-item:hover {
  border-color: var(--color-ink);
  background: var(--color-bg);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

/* ===========================
   Feature 布局
   =========================== */
.feature-layout-wrap {
  display: flex;
  gap: 0;
  padding-top: var(--nav-height);
  max-width: var(--content-max);
  margin: 0 auto;
  width: 100%;
}

/* 左侧边栏 aside 在内容左侧 */
.content-sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  padding: 40px 24px 40px 24px;
  position: sticky;
  top: var(--nav-height);
  height: calc(100vh - var(--nav-height));
  overflow-y: auto;
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.content-sidebar nav ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.content-sidebar nav a {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-main);
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--color-ink-muted);
  border-radius: var(--radius-btn);
  min-height: 40px;
  line-height: 1.4;
  display: flex;
  align-items: center;
  transition: all var(--transition-base);
}

.content-sidebar nav a:hover,
.content-sidebar nav a[aria-current="page"] {
  background: var(--color-surface);
  color: var(--color-ink);
  font-weight: 700;
}

.sidebar-cta-card {
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.sidebar-cta-label {
  font-family: var(--font-main);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-ink-muted);
  letter-spacing: 0.06em;
  margin: 0;
  line-height: 1.4;
}

.sidebar-related h4,
.sidebar-section-title {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  text-transform: uppercase;
  margin-bottom: 12px;
  font-family: var(--font-main);
}

.sidebar-related ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-related a {
  display: block;
  font-size: 0.82rem;
  color: var(--color-ink-muted);
  padding: 6px 0;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-base);
  line-height: 1.4;
}

.sidebar-related a:hover {
  color: var(--color-ink);
}

/* Feature 主体 */
.feature-main,
.pricing-main,
.faq-main,
.about-main,
.privacy-main {
  flex: 1;
  min-width: 0;
}

.feature-article {
  padding-bottom: 80px;
}

/* 粘性锚点条 */
.sticky-anchor-bar {
  position: sticky;
  top: var(--nav-height);
  z-index: 50;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.anchor-bar-inner {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 24px;
  max-width: var(--content-max);
  margin: 0 auto;
  overflow-x: auto;
  scrollbar-width: none;
}

.anchor-bar-inner::-webkit-scrollbar {
  display: none;
}

.anchor-item {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  font-family: var(--font-main);
  font-size: 0.8rem;
  color: var(--color-ink-muted);
  white-space: nowrap;
  transition: color var(--transition-base);
  border-bottom: 2px solid transparent;
}

.anchor-item:hover {
  color: var(--color-ink);
  border-bottom-color: var(--color-ink);
}

/* Feature hero div */
.feature-hero-section {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: start;
  padding: 48px 40px 40px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 0;
}

.feature-hero-inner {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feature-hero-index {
  display: flex;
  align-items: flex-start;
  padding-top: 8px;
}

.feature-big-num {
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 4rem;
  color: var(--color-surface);
  line-height: 1;
  letter-spacing: -0.04em;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-main);
  font-size: 0.78rem;
  color: var(--color-ink-muted);
}

.breadcrumb a {
  color: var(--color-ink-muted);
  transition: color var(--transition-base);
}

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

.article-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.article-date {
  font-family: var(--font-main);
  font-size: 0.8rem;
  color: var(--color-ink-faint);
}

.feature-lead {
  font-size: 1.05rem;
  color: var(--color-ink-muted);
  margin-bottom: 0;
}

.feature-nav-cards {
  padding: 48px 40px;
  border-top: 1px solid var(--color-border);
}

.feature-related-card {
  margin-top: 12px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  overflow: hidden;
  transition: all var(--transition-base);
}

.feature-related-card:hover {
  border-color: var(--color-ink);
  box-shadow: var(--shadow-card);
  transform: translateX(4px);
}

.feature-related-card a {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
}

.frc-title {
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-ink);
  flex-shrink: 0;
  max-width: 200px;
}

.frc-desc {
  font-size: 0.85rem;
  color: var(--color-ink-muted);
  flex: 1;
  line-height: 1.5;
}

.frc-arrow {
  font-size: 1.1rem;
  color: var(--color-ink-muted);
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.feature-related-card:hover .frc-arrow {
  transform: translateX(4px);
}

/* 正文区 padding（feature/pricing/faq/about/privacy） */
.page-content-section {
  padding: 48px 40px;
}

/* ===========================
   Pricing
   =========================== */
.pricing-hero-section {
  padding: 60px 40px 40px;
  border-bottom: 1px solid var(--color-border);
}

.pricing-eyebrow,
.faq-eyebrow,
.about-eyebrow,
.privacy-eyebrow {
  font-family: var(--font-main);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
  text-transform: uppercase;
  border-left: 3px solid var(--color-ink);
  padding-left: 10px;
  margin-bottom: 16px;
}

.pricing-cards-section {
  padding: 48px 40px;
  border-bottom: 1px solid var(--color-border);
}

.pricing-bento {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.pricing-card {
  border-radius: var(--radius-card);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.pricing-card:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-hover);
}

.pricing-month {
  background: var(--color-ink);
}

.pricing-month .pricing-badge,
.pricing-month .pricing-amount,
.pricing-month .amount-num,
.pricing-month .amount-unit {
  color: var(--color-bg);
}

.pricing-month .pricing-features li {
  color: rgba(255,255,255,0.85);
  border-color: rgba(255,255,255,0.15);
}

.pricing-month .btn-primary {
  background: var(--color-bg);
  color: var(--color-ink);
}

.pricing-month .btn-primary:hover {
  background: #e0e0e0;
}

.pricing-card-inner {
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.pricing-badge {
  font-family: var(--font-main);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.badge-hot, .badge-best {
  color: var(--color-ink);
}

.pricing-amount {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.amount-num {
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 2.8rem;
  color: var(--color-ink);
  line-height: 1;
}

.amount-unit {
  font-family: var(--font-main);
  font-size: 0.9rem;
  color: var(--color-ink-muted);
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.pricing-features li {
  font-size: 0.9rem;
  color: var(--color-ink);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
  line-height: 1.5;
}

.pricing-faq-section {
  padding: 48px 40px;
}

.faq-simple-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 24px;
}

.faq-simple-item {
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}

.faq-simple-item strong {
  display: block;
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 8px;
  color: var(--color-ink);
}

.faq-simple-item p {
  font-size: 0.9rem;
  color: var(--color-ink-muted);
  margin: 0;
}

.pricing-more-link {
  margin-top: 24px;
  font-family: var(--font-main);
  font-size: 0.9rem;
}

.pricing-more-link a {
  color: var(--color-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ===========================
   FAQ
   =========================== */
.faq-header-section {
  padding: 60px 40px 40px;
  border-bottom: 1px solid var(--color-border);
}

.faq-bottom-nav {
  padding: 48px 40px;
  border-top: 1px solid var(--color-border);
}

.faq-nav-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 28px;
}

.faq-nav-card {
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  transition: all var(--transition-base);
  overflow: hidden;
}

.faq-nav-card:hover {
  border-color: var(--color-ink);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.faq-nav-card a {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px;
}

.fnc-icon {
  font-size: 1.5rem;
}

.fnc-title {
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-ink);
}

.fnc-desc {
  font-size: 0.82rem;
  color: var(--color-ink-muted);
}

/* ===========================
   About
   =========================== */
.about-header-section {
  padding: 60px 40px 40px;
  border-bottom: 1px solid var(--color-border);
}

.about-bento-section {
  padding: 48px 40px;
  border-bottom: 1px solid var(--color-border);
}

.about-bento {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 200px;
  gap: 16px;
  margin-top: 28px;
}

.about-bento-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.about-bento-card:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-hover);
}

.about-card-wide {
  grid-column: span 2;
  background: var(--color-ink);
}

.about-card-wide h3,
.about-card-wide p,
.about-card-wide .about-card-num {
  color: var(--color-bg);
}

.about-card-wide p {
  color: rgba(255,255,255,0.75);
}

.about-card-num {
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.about-links-section {
  padding: 48px 40px;
}

.about-links-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 28px;
}

.about-link-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-ink);
  min-height: 60px;
  transition: all var(--transition-base);
}

.about-link-card:hover {
  background: var(--color-ink);
  color: var(--color-bg);
  border-color: var(--color-ink);
  transform: translateX(4px);
}

.alc-arrow {
  font-size: 1rem;
  transition: transform var(--transition-base);
}

.about-link-card:hover .alc-arrow {
  transform: translateX(4px);
}

.sidebar-about-stats {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  padding: 20px 16px;
}

.about-stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-num {
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-ink);
}

.stat-label {
  font-size: 0.78rem;
  color: var(--color-ink-muted);
}

/* ===========================
   Privacy
   =========================== */
.privacy-header-section {
  padding: 60px 40px 40px;
  border-bottom: 1px solid var(--color-border);
}

.privacy-date {
  font-family: var(--font-main);
  font-size: 0.82rem;
  color: var(--color-ink-faint);
  margin-top: 8px;
}

.privacy-content {
  font-size: 0.95rem;
}

.privacy-nav-section {
  padding: 48px 40px;
  border-top: 1px solid var(--color-border);
}

.privacy-nav-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.privacy-nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 20px;
  background: var(--color-surface);
  border-radius: var(--radius-btn);
  font-family: var(--font-main);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-ink);
  border: 1.5px solid var(--color-border);
  transition: all var(--transition-base);
}

.privacy-nav-link:hover {
  background: var(--color-ink);
  color: var(--color-bg);
  border-color: var(--color-ink);
}

.sidebar-update-note {
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.update-label {
  font-family: var(--font-main);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-ink-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.sidebar-update-note time {
  font-family: var(--font-main);
  font-size: 0.85rem;
  color: var(--color-ink);
}

/* ===========================
   页脚 footer > div×n
   =========================== */
.site-footer {
  background: var(--color-ink);
  color: var(--color-bg);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 0;
  margin-top: auto;
}

.site-footer div {
  padding: 48px 32px;
  border-right: 1px solid rgba(255,255,255,0.08);
}

.site-footer div:last-child {
  border-right: none;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-brand-text {
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-bg);
  line-height: 1.4;
  letter-spacing: 0.01em;
}

.footer-slogan {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.6;
  margin: 0;
}

.footer-nav-col h4 {
  font-family: var(--font-main);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  margin-bottom: 20px;
}

.footer-nav-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav-col a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  transition: color var(--transition-base);
  min-height: 28px;
  display: flex;
  align-items: center;
  line-height: 1.4;
}

.footer-nav-col a:hover {
  color: #ffffff;
}

.footer-contact h4 {
  font-family: var(--font-main);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  margin-bottom: 16px;
}

.footer-contact p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 16px;
  line-height: 1.6;
}

.subscribe-form {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.subscribe-form input {
  flex: 1;
  min-width: 0;
  padding: 10px 14px;
  font-family: var(--font-main);
  font-size: 0.85rem;
  background: rgba(255,255,255,0.08);
  border: 1.5px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-btn);
  color: var(--color-bg);
  outline: none;
  transition: border-color var(--transition-base);
}

.subscribe-form input::placeholder {
  color: rgba(255,255,255,0.35);
}

.subscribe-form input:focus {
  border-color: rgba(255,255,255,0.5);
}

.subscribe-form button {
  padding: 10px 20px;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.82rem;
  border-radius: var(--radius-btn);
  min-height: 40px;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.subscribe-form button:hover {
  background: #e0e0e0;
}

.footer-meta-nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-meta-nav a {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  transition: color var(--transition-base);
  min-height: 28px;
  display: flex;
  align-items: center;
}

.footer-meta-nav a:hover {
  color: rgba(255,255,255,0.9);
}

.footer-copy {
  grid-column: 1 / -1;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 32px;
  border-right: none !important;
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-copy p {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.4);
  text-align: center;
  margin: 0;
  line-height: 1.5;
}

/* ===========================
   首页特有
   =========================== */
.page-home .main-content {
  padding-top: 0;
}

/* ===========================
   动效控制
   =========================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ===========================
   响应式
   =========================== */
@media (max-width: 1024px) {
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .card-wide {
    grid-column: span 2;
  }

  .card-highlight {
    grid-column: span 2;
  }

  .pricing-bento {
    grid-template-columns: 1fr;
    grid-auto-rows: auto;
  }

  .pricing-card:hover {
    transform: none;
  }

  .about-bento {
    grid-template-columns: 1fr;
    grid-auto-rows: auto;
  }

  .about-card-wide {
    grid-column: span 1;
  }

  .site-footer {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: span 2;
  }

  .footer-contact {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 56px;
    --sidebar-w: 0px;
  }

  .nav-bar {
    padding: 0 16px;
  }

  .brand-link {
    font-size: 0.72rem;
    max-width: 140px;
  }

  .hero-content {
    grid-template-columns: 1fr;
    padding: 48px 24px;
    gap: 32px;
  }

  .hero-bg-text {
    font-size: clamp(5rem, 25vw, 10rem);
  }

  .hero-dashboard {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 100px;
  }

  .dash-tile-lg {
    grid-row: span 1;
  }

  .dash-tile-wide {
    grid-column: span 2;
  }

  .feature-layout-wrap {
    flex-direction: column;
    padding-top: var(--nav-height);
  }

  .content-sidebar {
    width: 100%;
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding: 20px 16px;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 16px;
    overflow-x: auto;
  }

  .content-sidebar nav ul {
    flex-direction: row;
    flex-wrap: nowrap;
    gap: 4px;
    overflow-x: auto;
  }

  .content-sidebar nav a {
    white-space: nowrap;
    font-size: 0.78rem;
    padding: 8px 12px;
    min-height: 36px;
  }

  .sidebar-cta-card,
  .sidebar-related,
  .sidebar-about-stats,
  .sidebar-update-note {
    display: none;
  }

  .feature-hero-section {
    grid-template-columns: 1fr;
    padding: 32px 20px 24px;
  }

  .feature-hero-index {
    display: none;
  }

  .feature-nav-cards,
  .pricing-hero-section,
  .pricing-cards-section,
  .pricing-faq-section,
  .faq-header-section,
  .faq-bottom-nav,
  .about-header-section,
  .about-bento-section,
  .about-links-section,
  .privacy-header-section,
  .privacy-nav-section {
    padding-left: 20px;
    padding-right: 20px;
  }

  .page-content-section {
    padding: 32px 20px;
  }

  .content-article {
    padding: 0 0 48px;
  }

  .bento-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: auto;
  }

  .bento-card,
  .card-wide,
  .card-tall,
  .card-highlight {
    grid-column: span 1;
    grid-row: span 1;
  }

  .card-inner {
    padding: 20px;
    min-height: 160px;
  }

  .quick-nav-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .quick-nav-item {
    font-size: 0.78rem;
    padding: 10px 12px;
    min-height: 48px;
  }

  .pricing-bento,
  .about-bento {
    gap: 12px;
  }

  .faq-nav-grid {
    grid-template-columns: 1fr;
  }

  .about-links-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }

  .footer-brand {
    grid-column: span 1;
  }

  .footer-contact {
    grid-column: span 1;
  }

  .site-footer div {
    padding: 32px 20px;
    border-right: none;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }

  .footer-copy {
    padding: 16px 20px;
  }

  .anchor-bar-inner {
    padding: 0 16px;
  }

  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .privacy-nav-links {
    flex-direction: column;
  }

  .privacy-nav-link {
    width: 100%;
    justify-content: center;
  }

  .sticky-anchor-bar {
    top: var(--nav-height);
  }
}

@media (max-width: 375px) {
  .hero-text h1 {
    font-size: 1.5rem;
  }

  .hero-dashboard {
    grid-auto-rows: 90px;
  }

  .dash-num {
    font-size: 1.5rem;
  }

  .quick-nav-grid {
    grid-template-columns: 1fr;
  }

  .fullscreen-menu li a {
    font-size: 0.9rem;
    padding: 10px 16px;
  }
}

/* ===========================
   打印
   =========================== */
@media print {
  .site-aside,
  .sticky-anchor-bar,
  .content-sidebar,
  .hero-bg-text,
  .fullscreen-menu {
    display: none !important;
  }

  .feature-layout-wrap {
    padding-top: 0;
  }

  .main-content {
    padding-top: 0;
  }
}