:root {
  --blue: #3569fd;
  --blue-bright: #1596ff;
  --blue-deep: #2370ff;
  --orange: #ff8a1c;
  --text: rgba(0, 0, 0, 0.88);
  --text-2: rgba(0, 0, 0, 0.65);
  --text-3: rgba(0, 0, 0, 0.45);
  --bg: #f8f9fd;
  --bg-blue: #ebf2fc;
  --line: rgba(0, 0, 0, 0.08);
  --white: #fff;
  --radius: 12px;
  --shadow: 0 8px 32px rgba(35, 112, 255, 0.12);
  --header-h: 62px;
  --hl: #1596ff;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

button,
input {
  font: inherit;
}

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

.container {
  width: min(1200px, calc(100% - 48px));
  margin: 0 auto;
}

.center {
  text-align: center;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 40px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 500;
  transition: 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue-deep), var(--blue-bright));
  color: #fff;
  box-shadow: 0 6px 16px rgba(53, 105, 253, 0.28);
}

.btn-primary:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
}

.btn-primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  filter: none;
}

.btn-outline {
  border-color: var(--blue);
  color: var(--blue);
  background: #fff;
}

.btn-outline:hover {
  background: rgba(53, 105, 253, 0.06);
}

.btn-ghost {
  border-color: var(--blue-bright);
  color: var(--blue-bright);
  background: transparent;
  height: 48px;
  padding: 0 28px;
  border-radius: 10px;
}

.btn-ghost:hover {
  background: rgba(21, 150, 255, 0.08);
}

.btn-lg {
  height: 48px;
  padding: 0 28px;
  font-size: 16px;
  border-radius: 10px;
}

.btn-block {
  width: 100%;
  height: 48px;
  font-size: 16px;
}

.text-link {
  color: var(--blue);
  font-weight: 500;
}

.text-link:hover {
  color: var(--blue-bright);
}

.text-blue {
  color: var(--blue-bright);
}

.tag {
  display: inline-block;
  margin-left: 4px;
  padding: 0 6px;
  border-radius: 4px;
  font-size: 11px;
  font-style: normal;
  color: #fff;
  background: var(--blue);
  vertical-align: middle;
}

.tag.new,
.tag.hot {
  background: var(--orange);
}

/* Header */
.site-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.site-header.is-scrolled {
  position: fixed;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--line);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  margin-right: 8px;
}

.logo img {
  height: 32px;
  width: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}

.nav-item {
  position: relative;
  padding: 8px 12px;
  color: rgba(0, 0, 0, 0.75);
  font-size: 14px;
  border-radius: 6px;
  cursor: pointer;
  white-space: nowrap;
}

.nav-item:hover,
.nav-item.is-active {
  color: var(--hl);
}

.nav-item.is-active {
  font-weight: 600;
}

.nav-item .tag {
  margin-left: 2px;
  vertical-align: middle;
}

.has-drop::after {
  content: "";
  display: inline-block;
  margin-left: 4px;
  border: 4px solid transparent;
  border-top-color: currentColor;
  transform: translateY(2px);
}

.dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 180px;
  padding: 10px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: 0.18s ease;
}

.dropdown a {
  display: block;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
}

.dropdown a span {
  display: block;
  margin-top: 2px;
  color: var(--text-3);
  font-size: 12px;
}

.dropdown a:hover {
  background: var(--bg);
  color: var(--blue);
}

.has-drop:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.dropdown-wide {
  display: grid;
  grid-template-columns: repeat(5, minmax(160px, 1fr));
  gap: 8px;
  min-width: 920px;
  left: -120px;
  padding: 20px;
}

.drop-title {
  padding: 4px 12px 10px;
  font-size: 13px;
  color: var(--text-3);
  font-weight: 600;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.link-share {
  color: var(--hl);
  font-size: 14px;
  font-weight: 500;
}

.btn-sm {
  height: 34px;
  padding: 0 16px;
  font-size: 14px;
  border-radius: 6px;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 0;
  background: transparent;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

/* Hero */
.hero {
  position: relative;
  padding: var(--header-h) 0 0;
  overflow: hidden;
  min-height: 665px;
  background: linear-gradient(180deg, #eef5ff 0%, #f7fbff 45%, #fff 100%);
}

.hero-bg-base {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 55% 45% at 18% 28%, rgba(21, 150, 255, 0.16), transparent 60%),
    radial-gradient(ellipse 45% 40% at 82% 18%, rgba(53, 105, 253, 0.1), transparent 55%);
}

.hero-wave {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 72px;
  height: 240px;
  background-size: 100% auto;
  background-position: center bottom;
  background-repeat: no-repeat;
  opacity: 0.9;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 404px;
  gap: 48px;
  align-items: center;
  min-height: 520px;
  padding: 36px 0 100px;
}

.hero-slide {
  display: none;
  animation: fadeUp 0.45s ease;
}

.hero-slide.is-active {
  display: block;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.hero-slide h1 {
  font-size: 40px;
  line-height: 58px;
  font-weight: 700;
  letter-spacing: 0.01em;
  margin-bottom: 8px;
  color: rgba(0, 0, 0, 0.88);
}

.hero-slide h1.hero-title-alt {
  color: #2a1a6e;
}

.hero-slide h2 {
  font-size: 22px;
  line-height: 32px;
  font-weight: 600;
  color: rgba(0, 0, 0, 0.88);
  margin-bottom: 20px;
}

.hl {
  color: var(--hl);
}

.hero-points {
  list-style: none;
  display: grid;
  gap: 12px;
  color: rgba(0, 0, 0, 0.65);
  font-size: 15px;
  line-height: 1.6;
}

.hero-points li {
  position: relative;
  padding-left: 16px;
}

.hero-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.25);
}

.hero-points strong {
  color: var(--hl);
  font-weight: 700;
}

.hero-points a {
  color: rgba(0, 0, 0, 0.65);
}

.hero-points a:hover {
  color: var(--hl);
}

.hero-checks {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin: 8px 0 28px;
  color: rgba(0, 0, 0, 0.75);
  font-size: 15px;
}

.hero-checks li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-checks li::before {
  content: "";
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--hl);
  box-shadow: inset 0 0 0 4px #fff, 0 0 0 1px var(--hl);
  flex-shrink: 0;
}

.hero-sub {
  margin: 16px 0 28px;
  font-size: 18px;
  color: var(--hl);
}

.price-pill {
  display: inline-block;
  margin-left: 8px;
  padding: 4px 14px;
  border-radius: 20px;
  color: #fff;
  background: linear-gradient(90deg, #ff6b9d, #ff4d4f);
  font-size: 16px;
  font-weight: 700;
  vertical-align: middle;
}

.accent-tiktok {
  background: linear-gradient(90deg, #25f4ee, #fe2c55);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-desc {
  max-width: 560px;
  margin: 12px 0 28px;
  color: var(--text-2);
  font-size: 15px;
  line-height: 1.8;
}

.btn-split {
  display: inline-flex;
  align-items: stretch;
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid #3b2a7a;
  box-shadow: 0 8px 20px rgba(59, 42, 122, 0.18);
}

.btn-split-l {
  background: #3b2a7a;
  color: #fff;
  padding: 12px 18px;
  font-weight: 600;
}

.btn-split-r {
  background: #fff;
  color: #3b2a7a;
  padding: 12px 20px;
  font-weight: 600;
}

.live-toast {
  margin-top: 28px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(53, 105, 253, 0.12);
  color: var(--text-2);
  font-size: 13px;
  box-shadow: 0 4px 16px rgba(53, 105, 253, 0.08);
  transition: opacity 0.2s;
}

.live-toast::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
}

.hero-dots {
  display: flex;
  gap: 8px;
  margin-top: 36px;
}

.hero-dots button {
  width: 28px;
  height: 3px;
  border: 0;
  border-radius: 2px;
  background: rgba(21, 150, 255, 0.25);
  cursor: pointer;
  padding: 0;
}

.hero-dots button.is-active {
  background: var(--hl);
}

.reg-card {
  background: #fff;
  border-radius: 12px;
  padding: 36px 32px 28px;
  box-shadow: 0 12px 40px rgba(35, 112, 255, 0.14);
  width: 100%;
}

.reg-card h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 28px;
  text-align: center;
  color: rgba(0, 0, 0, 0.88);
}

.phone-row {
  display: flex;
  border: 1px solid #d9d9d9;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 16px;
  transition: border-color 0.2s;
  height: 48px;
}

.phone-row:focus-within {
  border-color: var(--hl);
}

.code-select {
  border: 0;
  background: #fff;
  padding: 0 14px;
  color: var(--text);
  border-right: 1px solid #eee;
  cursor: pointer;
  min-width: 64px;
}

.phone-row input {
  flex: 1;
  border: 0;
  outline: 0;
  padding: 0 16px;
  font-size: 15px;
}

.agree {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin: 14px 0 12px;
  font-size: 12px;
  color: var(--text-3);
  cursor: pointer;
  line-height: 1.5;
}

.agree input {
  margin-top: 2px;
  accent-color: var(--hl);
}

.ref-link {
  display: block;
  text-align: center;
  font-size: 13px;
  color: var(--hl);
}

.hero-footer-bar {
  position: relative;
  z-index: 3;
  margin-top: -48px;
  background: #fff;
  border-radius: 20px 20px 0 0;
  box-shadow: 0 -6px 24px rgba(35, 112, 255, 0.06);
}

.hero-footer-inner {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  align-items: center;
  min-height: 72px;
  gap: 16px;
}

.news-bar-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 8px 18px 0;
  font-size: 14px;
  color: var(--text-2);
  border-right: 1px solid var(--line);
}

.news-bar-inner p {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.news-tag {
  flex-shrink: 0;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--orange);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
}

.os-support {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 0 12px 8px;
  overflow: hidden;
}

.os-label {
  flex-shrink: 0;
  font-size: 14px;
  color: var(--text-3);
  font-weight: 500;
}

.os-list {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 4px 18px;
  overflow-x: auto;
}

.os-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  min-width: 52px;
  color: var(--text-2);
  font-size: 12px;
  transition: color 0.2s;
}

.os-item img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.os-item:hover {
  color: var(--hl);
}

/* Sections common */
.section {
  padding: 88px 0;
}

.en-title {
  text-align: center;
  color: var(--blue-bright);
  font-size: 14px;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
  font-weight: 500;
}

.section-title {
  text-align: center;
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-desc {
  text-align: center;
  color: var(--text-3);
  margin-bottom: 48px;
}

/* Why */
.why {
  background: linear-gradient(180deg, #fff, var(--bg));
}

.why-slider {
  overflow: hidden;
}

.why-track {
  display: flex;
  transition: transform 0.45s ease;
}

.why-card {
  min-width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  background: #fff;
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.04);
  border: 1px solid var(--line);
}

.why-text h3 {
  font-size: 26px;
  line-height: 1.4;
  margin-bottom: 20px;
}

.why-text ul {
  list-style: none;
  display: grid;
  gap: 12px;
  margin-bottom: 24px;
  color: var(--text-2);
}

.why-text li::before {
  content: "• ";
  color: var(--blue);
  font-weight: 700;
}

.stat-row {
  display: flex;
  gap: 28px;
  margin-bottom: 20px;
}

.stat-row strong {
  display: block;
  font-size: 28px;
  color: var(--blue);
  line-height: 1.2;
}

.stat-row span {
  font-size: 13px;
  color: var(--text-3);
}

.why-visual {
  min-height: 280px;
  border-radius: 16px;
  background:
    radial-gradient(circle at 30% 30%, rgba(21, 150, 255, 0.35), transparent 50%),
    radial-gradient(circle at 70% 70%, rgba(53, 105, 253, 0.25), transparent 45%),
    linear-gradient(145deg, #e8f3ff, #f7fbff);
  position: relative;
  overflow: hidden;
}

.why-visual::after {
  content: "";
  position: absolute;
  inset: 18%;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(53, 105, 253, 0.12);
  box-shadow: 0 16px 40px rgba(53, 105, 253, 0.15);
}

.why-visual.v2 {
  background:
    radial-gradient(circle at 70% 20%, rgba(34, 197, 94, 0.2), transparent 45%),
    linear-gradient(145deg, #e8f3ff, #f0fff6);
}
.why-visual.v3 {
  background:
    radial-gradient(circle at 40% 60%, rgba(255, 138, 28, 0.25), transparent 50%),
    linear-gradient(145deg, #fff4e8, #eef5ff);
}
.why-visual.v4 {
  background:
    radial-gradient(circle at 50% 40%, rgba(139, 92, 246, 0.2), transparent 50%),
    linear-gradient(145deg, #f3eefe, #eef5ff);
}
.why-visual.v5 {
  background:
    radial-gradient(circle at 20% 70%, rgba(239, 68, 68, 0.18), transparent 50%),
    linear-gradient(145deg, #ffeef0, #eef5ff);
}

.why-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 28px;
}

.why-dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 0;
  background: rgba(53, 105, 253, 0.2);
  cursor: pointer;
}

.why-dots button.is-active {
  background: var(--blue);
  width: 24px;
  border-radius: 8px;
}

/* Platforms */
.platforms {
  background: #fff;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 16px;
}

.platform-item {
  height: 72px;
  display: grid;
  place-items: center;
  background: var(--bg);
  border-radius: 12px;
  color: var(--text-2);
  font-weight: 600;
  font-size: 14px;
  border: 1px solid transparent;
  transition: 0.2s;
}

.platform-item:hover {
  border-color: rgba(53, 105, 253, 0.25);
  color: var(--blue);
  background: #fff;
  box-shadow: 0 8px 20px rgba(53, 105, 253, 0.08);
}

/* Security hub */
.security-hub {
  background: linear-gradient(180deg, #0b1b3a, #132a56 40%, #1a3a7a);
  color: #fff;
}

.security-hub .en-title {
  color: #7ec8ff;
}

.security-hub .section-desc {
  color: rgba(255, 255, 255, 0.65);
}

.hub-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.hub-stat {
  text-align: center;
  padding: 24px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hub-stat strong {
  display: block;
  font-size: 36px;
  color: #7ec8ff;
  margin-bottom: 8px;
}

.hub-stat span {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

.hub-features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 32px;
}

.hub-feat {
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(21, 150, 255, 0.15);
  border: 1px solid rgba(126, 200, 255, 0.25);
  font-size: 13px;
  color: #cfe9ff;
}

.hub-panel {
  height: 240px;
  margin: 0 auto 36px;
  max-width: 900px;
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02)),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 40px,
      rgba(126, 200, 255, 0.05) 40px,
      rgba(126, 200, 255, 0.05) 41px
    );
  border: 1px solid rgba(126, 200, 255, 0.2);
  position: relative;
  overflow: hidden;
}

.hub-panel::before {
  content: "安全防护驾驶舱";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.45);
  font-size: 18px;
  letter-spacing: 0.12em;
}

.security-hub .btn-primary {
  box-shadow: 0 8px 24px rgba(21, 150, 255, 0.35);
}

/* Defense */
.defense {
  background: var(--bg);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  max-width: 980px;
  margin: 0 auto;
}

.tag-cloud button {
  border: 1px solid rgba(53, 105, 253, 0.18);
  background: #fff;
  color: var(--text-2);
  padding: 12px 18px;
  border-radius: 999px;
  cursor: pointer;
  transition: 0.2s;
  font-size: 14px;
}

.tag-cloud button:hover,
.tag-cloud button.is-active {
  background: linear-gradient(135deg, var(--blue-deep), var(--blue-bright));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 8px 20px rgba(53, 105, 253, 0.25);
}

/* Social proof */
.big-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.big-stats > div {
  text-align: center;
  padding: 24px 12px;
  background: var(--bg);
  border-radius: 16px;
}

.big-stats strong {
  display: block;
  font-size: 36px;
  color: var(--blue);
  line-height: 1.2;
  margin-bottom: 8px;
}

.big-stats span {
  color: var(--text-3);
  font-size: 14px;
}

.testimonial-wrap {
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.testimonial-track {
  display: flex;
  gap: 16px;
  width: max-content;
  animation: marquee 40s linear infinite;
}

.testimonial-track:hover {
  animation-play-state: paused;
}

@keyframes marquee {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

.t-card {
  width: 320px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
}

.t-card p {
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.7;
  min-height: 72px;
  margin-bottom: 16px;
}

.t-user strong {
  display: block;
  font-size: 15px;
}

.t-user span {
  color: var(--text-3);
  font-size: 12px;
}

/* Expert */
.expert {
  background: var(--bg);
}

.expert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.expert-card {
  height: 160px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 20px;
  color: #fff;
  font-weight: 600;
  background:
    linear-gradient(135deg, rgba(11, 27, 58, 0.55), rgba(53, 105, 253, 0.55)),
    linear-gradient(135deg, #1a3a7a, #3569fd);
  transition: transform 0.2s;
}

.expert-card:hover {
  transform: translateY(-4px);
}

/* Honors */
.honor-track {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.honor-item {
  min-height: 100px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 16px;
  border-radius: 12px;
  background: var(--bg);
  border: 1px solid var(--line);
  font-size: 13px;
  color: var(--text-2);
  font-weight: 500;
}

/* Partners */
.partners {
  background: var(--bg);
}

.partner-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.partner-logo {
  height: 80px;
  display: grid;
  place-items: center;
  background: #fff;
  border-radius: 12px;
  border: 1px solid var(--line);
  color: var(--text-2);
  font-weight: 700;
  letter-spacing: 0.04em;
}

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

.step {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 32px 28px;
  box-shadow: 0 8px 24px rgba(53, 105, 253, 0.04);
  transition: transform 0.2s, box-shadow 0.2s;
}

.step:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(53, 105, 253, 0.1);
}

.step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--blue-deep), var(--blue-bright));
  color: #fff;
  font-weight: 700;
  margin-bottom: 16px;
}

.step h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.step p {
  color: var(--text-2);
  font-size: 14px;
  margin-bottom: 16px;
  min-height: 64px;
}

/* Footer */
.site-footer {
  background: #0a1224;
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(5, 1fr);
  gap: 24px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .logo-text {
  color: #fff;
}

.footer-brand p {
  margin-top: 12px;
  font-size: 13px;
}

.site-footer h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 16px;
}

.site-footer a {
  display: block;
  font-size: 13px;
  margin-bottom: 10px;
  color: rgba(255, 255, 255, 0.55);
}

.site-footer a:hover {
  color: #7ec8ff;
}

.footer-bottom {
  padding-top: 20px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.35);
}

/* Float bar */
.float-bar {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 90;
  background: #fff;
  border-radius: 999px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.12);
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.float-bar a {
  width: 56px;
  padding: 10px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--text-2);
  border-radius: 12px;
}

.float-bar a:hover {
  color: var(--blue);
  background: var(--bg);
}

.float-bar i {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, #e8f1ff, #d6e7ff);
  position: relative;
}

.float-bar i::before {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  background: var(--blue);
  opacity: 0.7;
}

/* Responsive */
@media (max-width: 1200px) {
  .nav,
  .header-actions .link-share {
    display: none;
  }

  .menu-toggle {
    display: flex;
    margin-left: auto;
  }

  .header-actions {
    margin-left: 0;
  }

  .dropdown-wide {
    display: none;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-bottom: 72px;
  }

  .reg-card {
    max-width: 404px;
    margin: 0 auto;
  }

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

  .news-bar-inner {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .platform-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .big-stats,
  .hub-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .why-card,
  .steps,
  .expert-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .honor-track,
  .partner-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .float-bar {
    right: 10px;
    transform: translateY(-50%) scale(0.9);
  }

  .section-title {
    font-size: 28px;
  }

  .hero-slide h1 {
    font-size: 32px;
    line-height: 1.35;
  }
}

@media (max-width: 640px) {
  .platform-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .big-stats,
  .hub-stats,
  .honor-track,
  .partner-grid {
    grid-template-columns: 1fr 1fr;
  }

  .header-actions .btn-primary {
    padding: 0 10px;
    font-size: 13px;
  }

  .float-bar {
    display: none;
  }

  .section {
    padding: 64px 0;
  }
}