/* ============================================================
   Veridata · 数本清源 — 设计系统
   极简科技风：深空底色 / 蓝紫青渐变 / 玻璃拟态 / 网格光效
   ============================================================ */

:root {
  --bg: #05070f;
  --bg-soft: #0a0f1e;
  --surface: rgba(255, 255, 255, 0.03);
  --surface-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(148, 163, 184, 0.14);
  --border-strong: rgba(148, 163, 184, 0.28);

  --text: #f2f5fa;
  --text-secondary: #9aa7bd;
  --text-muted: #64708a;

  --blue: #4f7cff;
  --purple: #8b5cf6;
  --cyan: #22d3ee;
  --gradient: linear-gradient(100deg, var(--blue), var(--purple) 55%, var(--cyan));
  /* 文字专用提亮版：深色底 + 夜间模式压暗下仍可读，仅用于渐变文字 */
  --gradient-text: linear-gradient(100deg, #6d95ff 0%, #a78bfa 50%, #22d3ee 100%);

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;

  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro SC", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;

  --nav-h: 72px;
  --max-w: 1160px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

img,
svg {
  display: block;
}

::selection {
  background: rgba(139, 92, 246, 0.45);
  color: #fff;
}

/* ---------- 网格背景 ---------- */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 75%);
  pointer-events: none;
}

/* ---------- 光晕球 ---------- */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  pointer-events: none;
}

.orb-a {
  width: 520px;
  height: 520px;
  top: -160px;
  left: 50%;
  transform: translateX(-60%);
  background: radial-gradient(circle, rgba(79, 124, 255, 0.5), transparent 70%);
  animation: drift-a 16s ease-in-out infinite alternate;
}

.orb-b {
  width: 420px;
  height: 420px;
  top: 80px;
  right: -140px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.45), transparent 70%);
  animation: drift-b 20s ease-in-out infinite alternate;
}

.orb-c {
  width: 360px;
  height: 360px;
  top: 340px;
  left: -160px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.28), transparent 70%);
  animation: drift-c 18s ease-in-out infinite alternate;
}

.orb-d {
  width: 480px;
  height: 480px;
  top: -220px;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(79, 124, 255, 0.4), transparent 70%);
}

@keyframes drift-a {
  from { transform: translateX(-60%) translateY(0); }
  to   { transform: translateX(-45%) translateY(60px); }
}

@keyframes drift-b {
  from { transform: translateY(0); }
  to   { transform: translateY(-50px); }
}

@keyframes drift-c {
  from { transform: translateY(0); }
  to   { transform: translateY(70px); }
}

/* ---------- 通用 ---------- */
.section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 110px 24px;
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--cyan);
  padding: 6px 16px;
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.06);
  margin-bottom: 20px;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.section-desc {
  margin-top: 16px;
  color: var(--text-secondary);
  font-size: 16px;
}

.product-note {
  margin-top: 10px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
    background 0.25s var(--ease), border-color 0.25s var(--ease);
  white-space: nowrap;
}

.btn-sm {
  padding: 9px 20px;
  font-size: 14px;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 24px rgba(79, 124, 255, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(79, 124, 255, 0.55);
}

.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border-strong);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-ghost:hover {
  background: var(--surface-hover);
  border-color: rgba(148, 163, 184, 0.45);
  transform: translateY(-2px);
}

/* ---------- 导航 ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 5vw, 56px);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease),
    backdrop-filter 0.3s var(--ease);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(5, 7, 15, 0.72);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom-color: var(--border);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-mark {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  box-shadow: 0 0 20px rgba(79, 124, 255, 0.55);
}

.logo-accent {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 15px;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: var(--text);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--nav-h) + 40px) 24px 80px;
  overflow: hidden;
}

.hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: clamp(40px, 6vw, 88px);
  align-items: center;
  width: 100%;
  max-width: var(--max-w);
}

.hero-inner {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: var(--text-secondary);
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  margin-bottom: 32px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 12px var(--cyan); }
  50% { opacity: 0.5; box-shadow: 0 0 4px var(--cyan); }
}

.hero-title {
  font-size: clamp(40px, 7.5vw, 72px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.hero-sub {
  margin: 28px 0 0;
  max-width: 560px;
  font-size: clamp(15px, 2vw, 18px);
  color: var(--text-secondary);
}

.hero-cta {
  margin-top: 44px;
  display: flex;
  justify-content: flex-start;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  margin-top: 72px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: clamp(24px, 5vw, 56px);
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-num {
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.stat-label {
  font-size: 13.5px;
  color: var(--text-muted);
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* ---------- 凭证样板卡片 ---------- */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.cred-glow {
  position: absolute;
  inset: 6% 0;
  background: radial-gradient(
    closest-side,
    rgba(79, 124, 255, 0.32),
    rgba(139, 92, 246, 0.16) 55%,
    transparent 78%
  );
  filter: blur(52px);
  border-radius: 50%;
}

.cred-card {
  position: relative;
  width: min(400px, 94%);
  background: linear-gradient(165deg, #fff 0%, #f4f7ff 48%, #e9efff 100%);
  color: #10173a;
  border-radius: 18px;
  box-shadow:
    0 40px 90px -24px rgba(0, 0, 0, 0.65),
    0 0 0 1px rgba(255, 255, 255, 0.14),
    0 0 70px -12px rgba(79, 124, 255, 0.45);
  transform: rotate(2.5deg);
  animation: cred-float 7s ease-in-out infinite;
  overflow: hidden;
}

.cred-card::before {
  content: '';
  display: block;
  height: 5px;
  background: var(--gradient);
}

@keyframes cred-float {
  0%, 100% { transform: rotate(2.5deg) translateY(0); }
  50% { transform: rotate(1.4deg) translateY(-12px); }
}

.cred-head {
  padding: 20px 24px 14px;
  border-bottom: 1px dashed rgba(16, 23, 58, 0.14);
}

.cred-chip {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: #3d6bff;
  background: rgba(79, 124, 255, 0.1);
  border: 1px solid rgba(79, 124, 255, 0.32);
  border-radius: 999px;
  padding: 3px 11px;
  margin-bottom: 10px;
}

.cred-head h3 {
  font-size: 23px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.cred-head p {
  margin-top: 4px;
  font-size: 12.5px;
  color: rgba(16, 23, 58, 0.58);
}

.cred-body {
  padding: 6px 24px;
}

.cred-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  font-size: 12.5px;
  padding: 9px 0;
  border-bottom: 1px dashed rgba(16, 23, 58, 0.12);
}

.cred-row:last-child {
  border-bottom: none;
}

.cred-row > span:first-child {
  color: rgba(16, 23, 58, 0.55);
  flex-shrink: 0;
}

.cred-row > span:last-child {
  color: #10173a;
  font-weight: 600;
  text-align: right;
}

.mono {
  font-family: ui-monospace, 'SF Mono', 'JetBrains Mono', Menlo, Consolas, monospace;
  font-size: 0.96em;
}

.cred-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 24px 22px;
}

.cred-qr {
  width: 86px;
  height: 86px;
  padding: 4px;
  background: #fff;
  border: 1px solid rgba(16, 23, 58, 0.14);
  border-radius: 8px;
  flex-shrink: 0;
}

.cred-seal {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 82px;
  height: 82px;
  border: 2.5px solid rgba(211, 47, 47, 0.72);
  border-radius: 50%;
  color: rgba(211, 47, 47, 0.85);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  transform: rotate(-10deg);
  flex-shrink: 0;
}

.seal-star {
  font-size: 16px;
  line-height: 1;
  margin-bottom: 4px;
}

/* ---------- 现实困境威胁卡 ---------- */
.threat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 1060px;
  margin: 0 auto;
}

.threat-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.threat-card:hover {
  transform: translateY(-4px);
  border-color: rgba(248, 113, 113, 0.35);
}

.threat-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 12px;
  border: 1px solid rgba(248, 113, 113, 0.3);
  background: rgba(248, 113, 113, 0.1);
  color: #f87171;
}

.threat-icon svg {
  width: 22px;
  height: 22px;
}

.threat-text h4 {
  font-size: 16px;
  font-weight: 650;
  margin-bottom: 6px;
}

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

/* ---------- 产品卡片 ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 920px;
  margin: 0 auto;
}

.product-card {
  position: relative;
  padding: 36px 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease),
    background 0.35s var(--ease), box-shadow 0.35s var(--ease);
  overflow: hidden;
}

.product-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(420px circle at 50% -10%, rgba(79, 124, 255, 0.16), transparent 60%);
  opacity: 0;
  transition: opacity 0.35s var(--ease);
  pointer-events: none;
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: rgba(79, 124, 255, 0.4);
  background: var(--surface-hover);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45), 0 0 40px rgba(79, 124, 255, 0.12);
}

.product-card:hover::before {
  opacity: 1;
}

.product-card.featured {
  border-color: rgba(139, 92, 246, 0.45);
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.1), rgba(255, 255, 255, 0.02));
}

.card-flag {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--gradient);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}

.card-icon svg {
  width: 26px;
  height: 26px;
}

.icon-blue {
  color: var(--blue);
  background: rgba(79, 124, 255, 0.12);
  border: 1px solid rgba(79, 124, 255, 0.3);
}

.icon-purple {
  color: var(--purple);
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.3);
}

.icon-cyan {
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.3);
}

.product-card h3 {
  font-size: 21px;
  font-weight: 700;
}

.card-en {
  font-size: 13px;
  color: var(--cyan);
  letter-spacing: 0.08em;
  margin-top: 2px;
  margin-bottom: 14px;
}

.card-desc {
  font-size: 14.5px;
  color: var(--text-secondary);
  min-height: 66px;
}

.card-list {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card-list li {
  font-size: 13.5px;
  color: var(--text-secondary);
  padding-left: 20px;
  position: relative;
}

.card-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gradient);
}

/* ---------- 核心能力 ---------- */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.cap-item {
  padding: 28px 26px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease),
    background 0.3s var(--ease);
}

.cap-item:hover {
  transform: translateY(-4px);
  border-color: rgba(34, 211, 238, 0.35);
  background: var(--surface-hover);
}

.cap-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.22);
  margin-bottom: 16px;
}

.cap-icon svg {
  width: 22px;
  height: 22px;
}

.cap-item h4 {
  font-size: 16.5px;
  font-weight: 650;
  margin-bottom: 8px;
}

.cap-item p {
  font-size: 14px;
  color: var(--text-secondary);
}

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

.case-card {
  padding: 30px 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.case-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
}

.case-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.case-industry {
  font-size: 12.5px;
  color: var(--text-muted);
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.02);
}

.case-metric {
  font-size: 13px;
  color: var(--text-secondary);
}

.case-metric strong {
  color: var(--text);
  font-size: 15px;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.case-card h3 {
  font-size: 17px;
  font-weight: 650;
  margin-bottom: 10px;
}

.case-card p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ---------- 关于我们 ---------- */
.about-wrap {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
}

.about-desc {
  color: var(--text-secondary);
  font-size: 15.5px;
  margin-top: 18px;
  max-width: 560px;
}

.about-visual {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.about-card {
  padding: 28px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.about-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
}

.about-card:nth-child(3) {
  grid-column: span 2;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}

.glass {
  background: var(--surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.about-card-num {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.about-card-label {
  font-size: 13.5px;
  color: var(--text-muted);
}

/* 紧随上一板块的紧凑版块 */
/* ---------- 三级产品族 ---------- */
.tier-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.tier-card {
  position: relative;
  padding: 30px 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease),
    background 0.3s var(--ease);
}

.tier-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  background: var(--surface-hover);
}

.tier-icon {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.22);
  margin-bottom: 18px;
}

.tier-icon svg {
  width: 22px;
  height: 22px;
}

.tier-card h3 {
  font-size: 20px;
  font-weight: 700;
}

.tier-en {
  font-size: 12.5px;
  color: var(--cyan);
  letter-spacing: 0.06em;
  margin: 2px 0 12px;
}

.tier-card > p:last-child {
  font-size: 14px;
  color: var(--text-secondary);
}

.tier-featured {
  border-color: rgba(139, 92, 246, 0.45);
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.1), rgba(255, 255, 255, 0.02));
}

/* ---------- 核验区补充 ---------- */
.section-subhead {
  text-align: center;
  margin: 64px 0 32px;
}

.section-subhead h3 {
  font-size: 22px;
  font-weight: 700;
}

.section-subhead p {
  margin-top: 8px;
  font-size: 14.5px;
  color: var(--text-secondary);
}

.trust-strip {
  margin-top: 40px;
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.trust-item {
  padding: 14px 22px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 13.5px;
  color: var(--text-secondary);
}

.trust-item strong {
  color: var(--text);
  font-weight: 650;
  margin-right: 8px;
}

/* ---------- 气泡云 ---------- */
.bubble-cloud {
  margin-top: 40px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 14px;
}

.bubble {
  padding: 14px 22px;
  border: 1px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  font-size: 13.5px;
  color: var(--text-secondary);
  border-radius: 999px 999px 999px 12px;
}

.bubble:nth-child(even) {
  border-radius: 999px 12px 999px 999px;
}

.bubble strong {
  color: var(--text);
  font-weight: 650;
  margin-right: 8px;
}

.bubble-main {
  border-color: rgba(139, 92, 246, 0.42);
  background: linear-gradient(120deg, rgba(139, 92, 246, 0.14), rgba(34, 211, 238, 0.08));
  border-radius: 999px 999px 999px 16px;
  font-size: 14px;
}

.bubble-main strong {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- 金句条 ---------- */
.highlight-note {
  max-width: 720px;
  margin: 48px auto 0;
  text-align: center;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--text-secondary);
  padding: 22px 32px;
  border-radius: var(--radius);
  border: 1px solid rgba(79, 124, 255, 0.28);
  background: linear-gradient(180deg, rgba(79, 124, 255, 0.07), rgba(255, 255, 255, 0.02));
}

.highlight-note .gradient-text {
  font-weight: 700;
}

/* ---------- 核验能力 2×2 ---------- */
/* ---------- 核验步骤流 ---------- */
.verify-flex {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
  max-width: 1060px;
  margin: 0 auto 64px;
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.step {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 24px 26px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.step:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
}

.step-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 18px rgba(79, 124, 255, 0.4);
}

.step-icon svg {
  width: 22px;
  height: 22px;
}

.step h4 {
  font-size: 17px;
  font-weight: 650;
  margin-bottom: 8px;
}

.step p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ---------- 手机核验样板 ---------- */
.verify-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.verify-glow {
  position: absolute;
  inset: 8% 4%;
  background: radial-gradient(
    closest-side,
    rgba(34, 211, 238, 0.2),
    rgba(79, 124, 255, 0.14) 55%,
    transparent 78%
  );
  filter: blur(48px);
  border-radius: 50%;
}

.phone {
  position: relative;
  width: min(300px, 88%);
  padding: 10px;
  border-radius: 42px;
  border: 1px solid var(--border-strong);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.04));
  box-shadow:
    0 50px 100px -30px rgba(0, 0, 0, 0.7),
    0 0 60px -14px rgba(34, 211, 238, 0.28);
  transform: rotate(-2deg);
}

.phone-notch {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 96px;
  height: 22px;
  background: #05070f;
  border-radius: 999px;
  z-index: 2;
}

.phone-screen {
  border-radius: 33px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: linear-gradient(180deg, #0b1226 0%, #070b18 100%);
  padding: 54px 22px 24px;
}

.phone-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.phone-brand {
  font-size: 14px;
  font-weight: 700;
}

.phone-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--cyan);
  border: 1px solid rgba(34, 211, 238, 0.35);
  background: rgba(34, 211, 238, 0.08);
  padding: 3px 9px;
  border-radius: 999px;
}

.phone-live::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  animation: pulse 2.4s ease-in-out infinite;
}

.phone-title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.phone-id {
  margin-top: 6px;
  font-size: 12px;
  color: var(--text-muted);
}

.phone-checks {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.check-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-secondary);
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
}

.check-item b {
  margin-left: auto;
  color: var(--text);
  font-weight: 600;
}

.check-ok {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid rgba(34, 211, 238, 0.45);
  background: rgba(34, 211, 238, 0.12);
  color: var(--cyan);
  font-size: 11px;
  font-weight: 700;
}

.phone-pass {
  margin-top: 18px;
  text-align: center;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: #fff;
  padding: 14px;
  border-radius: 14px;
  background: linear-gradient(100deg, rgba(34, 211, 238, 0.95), rgba(79, 124, 255, 0.9));
  box-shadow: 0 8px 28px -6px rgba(34, 211, 238, 0.4);
}

.phone-time {
  margin-top: 12px;
  text-align: center;
  font-size: 11.5px;
  color: var(--text-muted);
}

/* ---------- CTA ---------- */
.cta-box {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: clamp(56px, 8vw, 88px) 32px;
  border-radius: 32px;
  border: 1px solid rgba(79, 124, 255, 0.35);
  background:
    linear-gradient(180deg, rgba(79, 124, 255, 0.12), rgba(139, 92, 246, 0.06)),
    var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.cta-box h2 {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 750;
  letter-spacing: -0.01em;
  position: relative;
  z-index: 1;
}

.cta-box p {
  margin-top: 14px;
  color: var(--text-secondary);
  font-size: 15.5px;
  position: relative;
  z-index: 1;
}

.cta-actions {
  margin-top: 36px;
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.cta-note {
  display: block;
  margin-top: 24px;
  font-size: 13px;
  color: var(--text-muted);
  position: relative;
  z-index: 1;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  background: rgba(5, 7, 15, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 64px 24px 40px;
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 48px;
}

.footer-brand p {
  margin-top: 14px;
  color: var(--text-muted);
  font-size: 13px;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.footer-col h5 {
  font-size: 14px;
  font-weight: 650;
  color: var(--text);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 13.5px;
  color: var(--text-muted);
  padding: 5px 0;
  transition: color 0.2s;
}

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

.footer-bottom {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 22px 24px 28px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 12.5px;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
}

.footer-bottom-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

/* ---------- 滚动渐入 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

.product-grid .reveal:nth-child(2),
.case-grid .reveal:nth-child(2) {
  transition-delay: 0.12s;
}

.product-grid .reveal:nth-child(3),
.case-grid .reveal:nth-child(3) {
  transition-delay: 0.24s;
}

/* 无 JS 时的兜底 */
.no-js .reveal {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 64px;
  }

  .verify-flex {
    grid-template-columns: 1fr;
  }

  .product-grid,
  .case-grid,
  .threat-grid {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin: 0 auto;
  }

  .cap-grid {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin: 0 auto;
  }

  .tier-grid {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin: 0 auto;
  }

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

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

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px 20px;
    background: rgba(5, 7, 15, 0.94);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
  }

  .nav-links.open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links a {
    padding: 14px 4px;
    font-size: 16px;
    border-bottom: 1px solid var(--border);
  }

  .nav-links a:last-child {
    border-bottom: none;
  }

  .nav-toggle {
    display: flex;
  }

  .section {
    padding: 80px 20px;
  }

  .hero {
    padding-top: calc(var(--nav-h) + 24px);
  }

  .hero-inner {
    text-align: center;
  }

  .hero-sub {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta,
  .hero-stats {
    justify-content: center;
  }

  .cred-card {
    width: min(320px, 92%);
  }

  .cap-grid {
    grid-template-columns: 1fr;
  }

  .verify-flex {
    margin-bottom: 48px;
  }

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

  .about-card:nth-child(3) {
    grid-column: span 1;
    flex-direction: column;
    align-items: flex-start;
  }

  .stat-divider {
    display: none;
  }

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

@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;
  }
}