@charset "UTF-8";
/* ============================================
   睿视 NovaVis Landing Page — Qoder-inspired
   Dark mode first, Police Blue accent
   ============================================ */

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

:root {
  --brand: #0033A0;
  --brand-dark: #001A4D;
  --brand-light: #3366CC;
  /* 文字色强调：较亮的蓝，保证在深色底上小号文字对比度 ≥ 4.5:1（WCAG AA）。
     仅用于文字内容；按钮背景/图标等非文字用法继续用 --brand-light。 */
  --brand-text: #8AB4F8;
  --brand-soft: rgba(51, 102, 204, 0.14);

  --bg: #050505;
  --bg-elevated: #0A0A0A;
  --bg-card: #0F0F0F;
  --bg-card-2: #131313;
  --bg-card-3: #080808;
  --surface: #151515;

  --text: #FFFFFF;
  --text-secondary: rgba(255,255,255,0.68);
  --text-tertiary: rgba(255,255,255,0.42);
  --text-muted: rgba(255,255,255,0.28);

  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.16);

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  --nav-height: 64px;
  --max-width: 1160px;
}

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-height) + 36px); }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  color: var(--text); background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }

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

/* ---- Skip & Focus ---- */
.skip-link { position: absolute; top: -100%; left: 16px; z-index: 200; padding: 12px 20px; background: var(--brand); color: #fff; border-radius: 0 0 var(--radius-sm) var(--radius-sm); font-size: 14px; font-weight: 600; }
.skip-link:focus { top: 0; outline: 2px solid var(--brand-light); outline-offset: 2px; }
:focus-visible { outline: 2px solid var(--brand-light); outline-offset: 2px; border-radius: var(--radius-sm); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius-pill);
  font-size: 15px; font-weight: 500; border: none; cursor: pointer;
  transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
  white-space: nowrap; letter-spacing: 0.01em; font-family: inherit;
}
.btn-lg { padding: 14px 34px; font-size: 16px; }
.btn-primary { background: var(--brand-light); color: #fff; }
.btn-primary:hover { background: #3F78E0; transform: translateY(-1px); }
.btn-outline {
  background: transparent; color: var(--text); border: 1px solid var(--border-strong);
}
.btn-outline:hover { background: rgba(255,255,255,0.05); border-color: rgba(255,255,255,0.25); }

/* ---- Section Titles ---- */
.section-title {
  font-family: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  font-size: clamp(30px, 4vw, 40px); font-weight: 700;
  letter-spacing: -0.01em; margin-bottom: 12px; text-wrap: balance; color: var(--text);
}
.section-desc { font-size: 17px; color: var(--text-secondary); max-width: 520px; text-wrap: pretty; }

/* ---- Announcement Bar ---- */
.announcement {
  position: fixed; top: 0; left: 0; right: 0; z-index: 101;
  height: 36px; background: var(--brand-dark);
  display: flex; align-items: center; border-bottom: 1px solid var(--border);
}
.announcement-inner { display: flex; align-items: center; justify-content: center; height: 100%; }
.announcement-text {
  font-size: 13px; font-weight: 500; color: rgba(255,255,255,0.75);
  letter-spacing: 0.02em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* ---- Nav ---- */
.nav {
  position: fixed; top: 36px; left: 0; right: 0; z-index: 100;
  height: var(--nav-height); background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease;
}
.nav.scrolled {
  background: rgba(5,5,5,0.94);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 17px; color: #fff; }
.nav-logo img { flex-shrink: 0; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a { padding: 8px 14px; border-radius: var(--radius-pill); font-size: 14px; font-weight: 500; color: rgba(255,255,255,0.6); transition: color 0.15s ease, background 0.15s ease; }
.nav-links a:hover { color: #fff; background: rgba(255,255,255,0.06); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; border: none; background: none; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: #fff; border-radius: 2px; transition: transform 0.3s ease, opacity 0.3s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Hero ---- */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  padding: 150px 0 0; background: var(--bg); overflow: hidden;
}
.hero-bg-pattern {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    radial-gradient(ellipse 70% 60% at 75% 45%, rgba(0,51,160,0.18) 0%, transparent 55%),
    radial-gradient(ellipse 50% 40% at 25% 20%, rgba(51,102,204,0.10) 0%, transparent 50%),
    radial-gradient(circle at 50% 100%, rgba(51,102,204,0.06) 0%, transparent 40%);
  pointer-events: none;
}
.hero-inner {
  display: grid; grid-template-columns: minmax(0, 480px) 1fr; gap: 64px; align-items: start;
  position: relative; z-index: 2;
}
.hero-copy { padding-top: 40px; max-width: 520px; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.06); border: 1px solid var(--border);
  color: var(--text-secondary); font-size: 13px; font-weight: 500;
  letter-spacing: 0.01em; margin-bottom: 22px;
}
.hero-title {
  font-family: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  font-size: clamp(44px, 5.8vw, 68px); font-weight: 900; color: #fff;
  line-height: 1.08; letter-spacing: -0.03em; margin-bottom: 24px; text-wrap: balance;
}
.hero-subtitle {
  font-size: 17px; color: var(--text-secondary); line-height: 1.75; margin-bottom: 36px;
  text-wrap: pretty; max-width: 480px;
}
.hero-actions { display: flex; align-items: center; gap: 14px; margin-bottom: 28px; }
.hero-badges { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 12px; border-radius: var(--radius-pill);
  background: var(--brand-soft); border: 1px solid rgba(51,102,204,0.22);
  color: var(--brand-text); font-size: 12px; font-weight: 600;
}
.hero-badge svg { flex-shrink: 0; }

.hero-visual { display: flex; justify-content: flex-end; }
.app-mockup {
  width: 100%; max-width: 720px;
  background: rgba(255,255,255,0.02); border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow:
    0 2px 4px rgba(0,0,0,0.18),
    0 4px 8px rgba(0,0,0,0.22),
    0 0 0 1px rgba(255,255,255,0.03) inset;
}
.app-mockup-chrome {
  display: flex; align-items: center; gap: 8px;
  height: 40px; padding: 0 16px;
  background: rgba(255,255,255,0.03); border-bottom: 1px solid var(--border);
}
.app-mockup-dot { width: 10px; height: 10px; border-radius: 50%; }
.app-mockup-dot--red { background: #FF5F56; }
.app-mockup-dot--yellow { background: #FFBD2E; }
.app-mockup-dot--green { background: #27C93F; }
.app-mockup-title {
  margin-left: 10px; font-size: 12px; color: var(--text-tertiary); font-weight: 500;
}
.app-mockup-body {
  display: grid; grid-template-columns: 150px 1fr 170px;
  min-height: 340px;
}
.app-mockup-sidebar {
  padding: 18px 12px; border-right: 1px solid var(--border);
  background: rgba(255,255,255,0.015);
}
.app-mockup-sidebar-item {
  padding: 9px 12px; border-radius: var(--radius-sm);
  font-size: 12px; color: var(--text-tertiary); margin-bottom: 2px;
  transition: color 0.15s, background 0.15s;
}
.app-mockup-sidebar-item.active,
.app-mockup-sidebar-item:hover {
  background: var(--brand-soft); color: var(--brand-text);
}
.app-mockup-main {
  display: flex; align-items: center; justify-content: center;
  padding: 16px; background: rgba(0,0,0,0.2);
}
.app-mockup-main svg { width: 100%; height: auto; display: block; }
.app-mockup-panel {
  padding: 18px; border-left: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}
.app-mockup-panel-title {
  font-size: 12px; font-weight: 600; color: var(--text-secondary);
  margin-bottom: 16px; letter-spacing: 0.02em;
}
.app-mockup-stat {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 0; border-bottom: 1px solid var(--border);
}
.app-mockup-stat-label { font-size: 12px; color: var(--text-tertiary); }
.app-mockup-stat-value { font-size: 13px; font-weight: 600; color: #fff; }
.app-mockup-alert {
  display: flex; align-items: center; gap: 8px;
  margin-top: 16px; padding: 10px 12px; border-radius: var(--radius-sm);
  background: rgba(51,102,204,0.12); border: 1px solid rgba(51,102,204,0.25);
  font-size: 12px; color: var(--brand-text); font-weight: 500; line-height: 1.45;
}
.app-mockup-alert-dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--brand-light);
  box-shadow: 0 0 8px var(--brand-light); flex-shrink: 0;
}

/* ---- Hero Highlights Strip ---- */
.hero-highlights {
  position: relative; z-index: 3;
  padding: 26px 0; background: var(--bg-elevated);
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.hero-highlights-inner {
  display: flex; align-items: center; justify-content: center; gap: 10px 24px; flex-wrap: wrap;
  color: var(--text-secondary); font-size: 14px; letter-spacing: 0.01em;
}
.hero-highlights-dot { color: var(--brand-text); font-weight: 700; }

/* ========================================
   Product Showcase — Qoder-style big card
   ======================================== */
.showcase { padding: 110px 0 100px; background: var(--bg); }
.showcase-header { text-align: center; margin-bottom: 56px; }
.showcase-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.06); border: 1px solid var(--border);
  color: var(--text-secondary); font-size: 13px; font-weight: 500;
  letter-spacing: 0.01em; margin-bottom: 18px;
}
.showcase-card {
  max-width: 1040px; margin: 0 auto;
  background: var(--bg-card); border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: 0 2px 4px rgba(0,0,0,0.16), 0 4px 8px rgba(0,0,0,0.2);
}
.showcase-tabs {
  display: flex; align-items: center; gap: 8px;
  padding: 16px 20px; border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}
.showcase-tab {
  padding: 8px 16px; border-radius: var(--radius-pill);
  background: transparent; border: 1px solid transparent;
  color: var(--text-tertiary); font-size: 14px; font-weight: 500;
  cursor: pointer; transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  font-family: inherit;
}
.showcase-tab:hover { color: var(--text-secondary); background: rgba(255,255,255,0.04); }
.showcase-tab.active { color: #fff; background: var(--brand-soft); border-color: rgba(51,102,204,0.35); }
.showcase-body { position: relative; }
.showcase-panel {
  display: none; grid-template-columns: 1.4fr 1fr; gap: 0;
  align-items: stretch;
}
.showcase-panel.active { display: grid; }
.showcase-visual {
  display: flex; align-items: center; justify-content: center;
  padding: 32px; background: rgba(0,0,0,0.22); border-right: 1px solid var(--border);
  min-height: 420px;
}
.showcase-visual svg { width: 100%; height: auto; display: block; }
.showcase-copy {
  padding: 48px 40px; display: flex; flex-direction: column; justify-content: center;
  background: var(--bg-card-2);
}
.showcase-copy-title {
  font-family: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  font-size: 26px; font-weight: 700; color: #fff; margin-bottom: 14px; text-wrap: balance;
}
.showcase-copy-desc { font-size: 15px; color: var(--text-secondary); line-height: 1.75; margin-bottom: 28px; }
.showcase-copy-list { list-style: none; }
.showcase-copy-list li {
  position: relative; padding-left: 22px; margin-bottom: 12px;
  font-size: 14px; color: var(--text-secondary); line-height: 1.6;
}
.showcase-copy-list li::before {
  content: ''; position: absolute; left: 0; top: 7px;
  width: 7px; height: 7px; border-radius: 50%; background: var(--brand-light);
}

/* ========================================
   Features — Swiper Carousel
   ======================================== */
.features { padding: 110px 0 100px; background: var(--bg); }
.features .section-title,
.features .section-desc { text-align: center; }
.features .section-desc { margin: 0 auto 56px; }

.features-carousel { position: relative; max-width: 1040px; margin: 0 auto; }

/* 兜底：隔离内网无法加载 Swiper 时，功能卡以网格平铺，避免单行横向溢出。
   一旦 Swiper 初始化（容器带上 .swiper-initialized），本规则自动失效，恢复轮播。 */
.features .swiper:not(.swiper-initialized) .swiper-wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.features .swiper:not(.swiper-initialized) .swiper-slide { width: auto; }

.feature-card {
  padding: 36px 32px; border-radius: var(--radius-lg); color: #fff; min-height: 280px;
  height: 100%; display: flex; flex-direction: column;
  transition: transform 0.3s ease, border-color 0.3s ease;
  border: 1px solid var(--border); background: var(--bg-card);
}
.feature-card:hover { transform: translateY(-4px); border-color: var(--border-strong); }

.feature-card-icon { margin-bottom: 24px; color: var(--brand-light); }
.feature-card-icon svg { display: block; }
.feature-card-title {
  font-family: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  font-size: 20px; font-weight: 700; margin-bottom: 10px; text-wrap: balance;
}
.feature-card-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.7; flex: 1; }

#featuresSwiper { overflow: hidden; padding: 4px 2px 48px; }
#featuresSwiper .swiper-pagination { bottom: 4px; }
#featuresSwiper .swiper-pagination-bullet {
  width: 8px; height: 8px; background: var(--text-muted); opacity: 0.5;
  transition: opacity 0.2s ease, background 0.2s ease;
}
#featuresSwiper .swiper-pagination-bullet-active { background: var(--brand-light); opacity: 1; }

.features-prev, .features-next {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--border-strong); background: var(--bg-card);
  color: var(--text-secondary); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s ease; z-index: 10;
}
.features-prev { left: -20px; }
.features-next { right: -20px; }
.features-prev:hover, .features-next:hover { background: var(--brand-light); color: #fff; border-color: var(--brand-light); }
.features-prev.swiper-button-disabled,
.features-next.swiper-button-disabled { opacity: 0.2; cursor: default; pointer-events: none; }

/* ========================================
   Product Matrix — Qoder-style cards
   ======================================== */
.product-matrix { padding: 0 0 110px; background: var(--bg); }
.product-matrix .section-title,
.product-matrix .section-desc { text-align: center; }
.product-matrix .section-desc { margin: 0 auto 56px; }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; max-width: 1040px; margin: 0 auto; }

.product-card {
  padding: 32px 28px; border-radius: var(--radius-lg); min-height: 280px;
  color: #fff; display: flex; flex-direction: column;
  border: 1px solid var(--border); background: var(--bg-card);
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.product-card:hover { transform: translateY(-4px); border-color: var(--border-strong); }

.product-card-icon { margin-bottom: 20px; color: rgba(255,255,255,0.8); }
.product-card-icon svg { display: block; }
.product-card-title { font-size: 20px; font-weight: 600; margin-bottom: 8px; letter-spacing: -0.01em; }
.product-card-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.7; flex: 1; margin-bottom: 20px; }
.product-card-link { font-size: 14px; font-weight: 500; color: var(--brand-text); display: inline-flex; align-items: center; gap: 4px; }
.product-card-link:hover { color: #5B8CE6; }

/* ========================================
   Scenarios — Color Block Cards
   ======================================== */
.scenarios { padding: 110px 0 100px; background: var(--bg-elevated); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.scenarios .section-title,
.scenarios .section-desc { text-align: center; }
.scenarios .section-desc { margin: 0 auto 56px; }

.scenarios-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }

.scenario-card {
  padding: 40px 32px; border-radius: var(--radius-lg); color: #fff;
  border: 1px solid var(--border); background: var(--bg-card);
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.scenario-card:hover { transform: translateY(-4px); border-color: var(--border-strong); }

.scenario-card-tag {
  display: inline-block; padding: 4px 12px; border-radius: var(--radius-pill);
  background: var(--brand-soft); color: var(--brand-text);
  font-size: 12px; font-weight: 600; letter-spacing: 0.02em; margin-bottom: 18px;
}
.scenario-card-title { font-family: 'Noto Serif CJK SC', 'Source Han Serif SC', 'Songti SC', 'SimSun', serif; font-size: 20px; font-weight: 700; margin-bottom: 10px; text-wrap: balance; }
.scenario-card-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 18px; }
.scenario-card-points { list-style: none; padding: 16px 0 0; border-top: 1px solid var(--border); }
.scenario-card-points li { font-size: 13px; color: var(--text-tertiary); padding: 4px 0 4px 18px; position: relative; line-height: 1.6; }
.scenario-card-points li::before { content: ''; position: absolute; left: 0; top: 11px; width: 6px; height: 6px; border-radius: 50%; background: var(--brand-light); opacity: 0.5; }

/* ========================================
   Process — Horizontal Steps
   ======================================== */
.process { padding: 110px 0 100px; background: var(--bg); }
.process .section-title,
.process .section-desc { text-align: center; }
.process .section-desc { margin: 0 auto 56px; }

.process-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; max-width: 1040px; margin: 0 auto; }
.process-step {
  position: relative; padding: 40px 32px; border-radius: var(--radius-lg);
  background: var(--bg-card); border: 1px solid var(--border);
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.process-step:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.process-step-number {
  position: absolute; top: 20px; right: 24px;
  font-family: 'Noto Serif CJK SC', 'Source Han Serif SC', 'Songti SC', 'SimSun', serif; font-size: 48px; font-weight: 900;
  color: rgba(255,255,255,0.04); line-height: 1; pointer-events: none;
}
.process-step-icon { margin-bottom: 20px; color: var(--brand-light); }
.process-step-icon svg { display: block; }
.process-step-phase {
  display: inline-block; padding: 3px 10px; border-radius: var(--radius-pill);
  background: var(--brand-soft); font-size: 12px; font-weight: 600;
  color: var(--brand-text); letter-spacing: 0.02em; margin-bottom: 12px;
}
.process-step-title { font-family: 'Noto Serif CJK SC', 'Source Han Serif SC', 'Songti SC', 'SimSun', serif; font-size: 18px; font-weight: 700; margin-bottom: 8px; text-wrap: balance; }
.process-step-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ========================================
   Trust / 信创
   ======================================== */
.trust { padding: 110px 0 100px; background: var(--bg-elevated); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.trust .section-title,
.trust .section-desc { text-align: center; }
.trust .section-desc { margin: 0 auto 56px; }

.trust-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; max-width: 1040px; margin: 0 auto 56px; }
.trust-os-card { text-align: center; padding: 36px 20px; border-radius: var(--radius-lg); background: var(--bg-card); border: 1px solid var(--border); transition: border-color 0.2s ease, transform 0.2s ease; }
.trust-os-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.trust-os-icon { display: flex; align-items: center; justify-content: center; height: 36px; margin-bottom: 14px; }
.trust-os-icon img, .trust-os-icon svg { display: block; max-height: 32px; max-width: 100%; width: auto; height: auto; object-fit: contain; }
.trust-os-icon img[src*="apple.svg"] { filter: brightness(0) invert(1); }
.trust-os-name { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 2px; }
.trust-os-desc { font-size: 12px; color: var(--text-tertiary); }

.trust-metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; max-width: 1040px; margin: 0 auto; padding: 48px 0 0; border-top: 1px solid var(--border); }
.trust-metric { text-align: center; }
.trust-metric-value { display: block; font-family: 'Noto Serif CJK SC', 'Source Han Serif SC', 'Songti SC', 'SimSun', serif; font-size: 32px; font-weight: 900; color: #fff; letter-spacing: -0.02em; margin-bottom: 4px; }
.trust-metric-label { font-size: 13px; color: var(--text-tertiary); line-height: 1.5; }

/* ========================================
   Social Proof
   ======================================== */
.social-proof { padding: 110px 0 100px; background: var(--bg); }
.social-proof .section-title,
.social-proof .section-desc { text-align: center; }
.social-proof .section-desc { margin: 0 auto 56px; }

.social-proof-grid { display: flex; justify-content: center; gap: 72px; flex-wrap: wrap; }
.social-proof-stat { text-align: center; }
.social-proof-stat-value { display: block; font-family: 'Noto Serif CJK SC', 'Source Han Serif SC', 'Songti SC', 'SimSun', serif; font-size: 56px; font-weight: 900; color: #fff; letter-spacing: -0.03em; line-height: 1; }
.social-proof-stat-label { display: block; font-size: 15px; color: var(--text-secondary); margin-top: 10px; }

/* ========================================
   FAQ
   ======================================== */
.faq { padding: 110px 0 100px; background: var(--bg-elevated); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.faq .section-title,
.faq .section-desc { text-align: center; }
.faq .section-desc { margin: 0 auto 56px; }
.faq-list { max-width: 760px; margin: 0 auto; }

.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:first-child { border-top: 1px solid var(--border); }

.faq-question {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; padding: 22px 0; border: none; background: none;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px; font-weight: 500; color: #fff; cursor: pointer;
  text-align: left; list-style: none; transition: color 0.15s ease;
}
.faq-question:hover { color: var(--brand-text); }
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after {
  content: ''; display: inline-block; width: 20px; height: 20px;
  background: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 20 20' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M5 7.5l5 5 5-5' stroke='%233366CC' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center no-repeat;
  transition: transform 0.25s ease; flex-shrink: 0; margin-left: 12px;
}
.faq-item[open] .faq-question::after { transform: rotate(180deg); }

.faq-answer { padding: 0 0 22px; }
.faq-answer p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ========================================
   CTA
   ======================================== */
.cta { padding: 110px 0; background: var(--bg); }
.cta-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.cta-copy { padding-top: 8px; }
.cta-title { font-family: 'Noto Serif CJK SC', 'Source Han Serif SC', 'Songti SC', 'SimSun', serif; font-size: clamp(32px, 4vw, 44px); font-weight: 900; color: #fff; line-height: 1.15; letter-spacing: -0.02em; margin-bottom: 14px; text-wrap: balance; }
.cta-desc { font-size: 16px; color: var(--text-secondary); line-height: 1.7; text-wrap: pretty; }

.cta-form { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 32px; }
.cta-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.cta-form-field { display: flex; flex-direction: column; gap: 6px; }
.cta-form-field--full { margin-bottom: 20px; }
.cta-form-label { font-size: 13px; font-weight: 500; color: var(--text-secondary); }
.cta-form-label span { color: #F87171; }
.cta-form-input { padding: 11px 14px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--bg-card-3); color: #fff; font-size: 14px; font-family: inherit; line-height: 1.5; transition: border-color 0.15s ease, background 0.15s ease; }
.cta-form-input::placeholder { color: var(--text-muted); }
.cta-form-input:focus { outline: none; border-color: var(--brand-light); background: var(--bg-card-2); }
.cta-form-input:invalid:not(:placeholder-shown):not(:focus) { border-color: #F87171; }
.cta-form-error { font-size: 12px; color: #FCA5A5; min-height: 16px; }
.cta-form-submit { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.cta-form-submit .btn-primary { background: var(--brand-light); }
.cta-form-submit .btn-primary:hover { background: #3F78E0; }
.cta-form-note { font-size: 13px; color: var(--text-tertiary); }
.cta-form-note a { color: var(--text-secondary); text-decoration: underline; transition: color 0.15s; }
.cta-form-note a:hover { color: #fff; }
.cta-form-privacy { font-size: 12px; color: var(--text-tertiary); margin-top: 16px; line-height: 1.5; }
.cta-form-success { text-align: center; padding: 32px; color: #fff; }
.cta-form-success p { font-size: 15px; }

/* ---- Back to top ---- */
.back-to-top {
  position: fixed; bottom: 32px; right: 32px; z-index: 50;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--bg-card); color: #fff; border: 1px solid var(--border-strong); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.2s ease;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-2px); background: var(--brand-light); border-color: var(--brand-light); }

/* ---- Footer ---- */
.footer { padding: 72px 0 0; background: var(--bg-elevated); border-top: 1px solid var(--border); color: var(--text-tertiary); }
.footer-inner { display: flex; justify-content: space-between; gap: 56px; margin-bottom: 48px; }
.footer-brand { max-width: 360px; }
.footer-logo-row { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-brand-name { font-size: 17px; font-weight: 600; color: #fff; }
.footer-desc { font-size: 13px; line-height: 1.7; color: var(--text-tertiary); }
.footer-links { display: flex; gap: 64px; }
.footer-col-title { font-size: 13px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-col a { display: block; font-size: 13px; color: var(--text-tertiary); padding: 4px 0; transition: color 0.15s; }
.footer-col a:hover { color: var(--brand-light); }
.footer-bottom { padding: 20px 0; border-top: 1px solid var(--border); text-align: center; font-size: 12px; color: var(--text-muted); }

/* ---- Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
  .motion-particle { display: none; }
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; text-align: center; }
  .showcase-panel.active { grid-template-columns: 1fr; }
  .showcase-visual { border-right: none; border-bottom: 1px solid var(--border); min-height: 320px; }
  .showcase-copy { padding: 36px 28px; }
  .hero-copy { padding-top: 0; max-width: 640px; margin: 0 auto; }
  .hero-eyebrow { margin-bottom: 18px; }
  .hero-subtitle { max-width: 560px; margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-badges { justify-content: center; }
  .hero-visual { order: -1; justify-content: center; }
  .app-mockup { max-width: 640px; margin: 0 auto; }
  .app-mockup-body { grid-template-columns: 130px 1fr 150px; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-inner { grid-template-columns: 1fr; gap: 48px; }
  .trust-grid { grid-template-columns: repeat(3, 1fr); }
  .process-steps { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .scenarios-grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; }
  .features-prev { left: 0; }
  .features-next { right: 0; }
}

@media (max-width: 768px) {
  .hero { padding: 120px 0 0; }
  .hero-title { font-size: 36px; letter-spacing: -0.02em; }
  .hero-badges { justify-content: center; }
  .hero-highlights-inner { gap: 8px 18px; text-align: center; }
  .app-mockup-body { grid-template-columns: 1fr; }
  .app-mockup-sidebar { display: none; }
  .app-mockup-panel { display: none; }
  .app-mockup-main { min-height: 240px; }

  .nav-links { display: none; position: absolute; top: var(--nav-height); left: 0; right: 0; flex-direction: column; background: rgba(5,5,5,0.98); padding: 12px; border-bottom: 1px solid var(--border); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); color: var(--text-secondary); }
  .nav-links a:hover { color: #fff; background: rgba(255,255,255,0.06); }
  .nav-toggle { display: flex; }

  .product-grid { grid-template-columns: 1fr; }
  .features-prev, .features-next { display: none; }
  .process-steps { grid-template-columns: 1fr; gap: 16px; max-width: 420px; margin: 0 auto; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); max-width: 100%; }
  .trust-metrics { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .social-proof-grid { flex-direction: column; gap: 28px; }
  .social-proof-stat-value { font-size: 46px; }
  .faq-question { font-size: 15px; padding: 18px 0; }
  .faq-list { max-width: 100%; }
  .back-to-top { bottom: 20px; right: 20px; width: 40px; height: 40px; }
  .cta-form-row { grid-template-columns: 1fr; }
  .cta-form { padding: 24px; }
  .footer-inner { flex-direction: column; gap: 36px; }
  .footer-links { flex-wrap: wrap; gap: 28px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 30px; }
  .trust-grid { grid-template-columns: 1fr; }
  .trust-metrics { grid-template-columns: 1fr 1fr; gap: 20px; }
  .trust-metric-value { font-size: 28px; }
  .process-step-number { font-size: 40px; }
  .social-proof-stat-value { font-size: 38px; }
  .features-carousel { max-width: 100%; }
}