:root {
  --bg: #f6f8fc;
  --bg-alt: #ffffff;
  --line: #d7e2f4;
  --text: #1a2a44;
  --text-soft: #546786;
  --brand: #0f78ff;
  --brand-2: #14b8a6;
  --brand-dark: #0b56b2;
  --warn: #e67e22;
  --radius-lg: 22px;
  --radius-md: 14px;
  --shadow: 0 16px 34px rgba(26, 42, 68, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 0% 0%, rgba(20, 184, 166, 0.18), transparent 40%),
    radial-gradient(circle at 100% -10%, rgba(15, 120, 255, 0.16), transparent 44%),
    var(--bg);
  line-height: 1.68;
}

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

img,
svg {
  display: block;
}

.container {
  width: min(1140px, calc(100% - 38px));
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.8);
  border-bottom: 1px solid rgba(215, 226, 244, 0.95);
}

.header-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 700;
}

.logo small {
  display: block;
  margin-top: 1px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-soft);
}

.logo svg {
  width: 32px;
  height: 32px;
}

.nav {
  display: inline-flex;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px;
  background: #edf3fc;
}

.nav a {
  font-size: 14px;
  font-weight: 700;
  color: #3c5278;
  padding: 8px 16px;
  border-radius: 999px;
  transition: all 0.2s ease;
}

.nav a:hover {
  background: #dbe8fb;
}

.page-home .nav-home,
.page-download .nav-download,
.page-zh .nav-zh {
  color: #fff;
  background: linear-gradient(135deg, #0f78ff, #0b56b2);
  box-shadow: 0 10px 22px rgba(15, 120, 255, 0.28);
}

.hero {
  padding: 56px 0 20px;
}

.hero-wrap {
  display: grid;
  grid-template-columns: 1.18fr 0.82fr;
  gap: 18px;
}

.panel,
.card,
.review,
.faq details,
.block,
.table-box,
.cta-box {
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  border: 1px solid #cde8e4;
  background: #e7f8f4;
  color: #15665d;
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 700;
}

.badge svg {
  width: 16px;
  height: 16px;
}

.hero h1 {
  margin: 14px 0 0;
  font-size: clamp(30px, 4vw, 50px);
  line-height: 1.18;
}

.hero p {
  margin-top: 16px;
  margin-bottom: 0;
  color: var(--text-soft);
  font-size: 17px;
}

.actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  border: 1px solid transparent;
  border-radius: 12px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  padding: 12px 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:disabled {
  opacity: 0.9;
  cursor: not-allowed;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: linear-gradient(135deg, #0f78ff, #0b56b2);
  color: #fff;
  border-color: #0b56b2;
  box-shadow: 0 10px 20px rgba(15, 120, 255, 0.24);
}

.btn-secondary {
  background: #e9f2ff;
  color: #1d4b8f;
  border-color: #c6dbff;
}

.btn-light {
  background: #fff;
  color: #365271;
  border-color: #d6e0ef;
}

.panel {
  padding: 22px;
}

.panel h2 {
  margin: 0;
  font-size: 22px;
}

.point-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.point-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: #3d567b;
}

.point-list li svg {
  width: 18px;
  height: 18px;
  margin-top: 4px;
  color: var(--brand-dark);
  flex-shrink: 0;
}

.tagline {
  margin-top: 16px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tagline span {
  font-size: 12px;
  color: #416490;
  background: #edf3ff;
  border: 1px solid #d4e2ff;
  border-radius: 999px;
  padding: 5px 10px;
}

.section {
  margin-top: 50px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(24px, 2.5vw, 36px);
}

.section-head p {
  margin: 10px 0 0;
  color: var(--text-soft);
}

.grid-3,
.grid-4,
.review-grid,
.dual-grid,
.log-grid {
  margin-top: 16px;
  display: grid;
  gap: 14px;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.review-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.dual-grid,
.log-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card,
.review,
.block {
  padding: 18px;
}

.card .icon,
.review .icon,
.block .icon {
  width: 24px;
  height: 24px;
  color: var(--brand-dark);
}

.card h3,
.block h3 {
  margin: 12px 0 8px;
  font-size: 19px;
}

.card p,
.block p,
.review p {
  margin: 0;
  color: #475f84;
  font-size: 14px;
}

.platform-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.platform-top strong {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  font-size: 17px;
}

.platform-top strong svg {
  width: 20px;
  height: 20px;
}

.flag {
  background: #fff4e8;
  color: #a85a14;
  border: 1px solid #f6d4b3;
  font-size: 12px;
  border-radius: 999px;
  padding: 5px 10px;
}

.platform-note {
  margin-top: 10px;
  min-height: 44px;
}

.platform-action {
  margin-top: 14px;
  width: 100%;
}

.review-head {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  color: #355883;
  font-size: 13px;
  font-weight: 700;
}

.review-head svg {
  width: 16px;
  height: 16px;
}

.review p {
  margin-top: 10px;
  margin-bottom: 10px;
}

.review b {
  font-size: 14px;
}

.faq {
  margin-top: 16px;
  display: grid;
  gap: 10px;
}

.faq details {
  overflow: hidden;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 15px 18px;
  font-weight: 700;
  color: #1f3a63;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary svg {
  width: 16px;
  height: 16px;
  color: #4c6d97;
  transition: transform 0.2s ease;
}

.faq details[open] summary svg {
  transform: rotate(180deg);
}

.faq-body {
  border-top: 1px solid #e6edf8;
  padding: 12px 18px 18px;
  color: #4c6185;
  font-size: 14px;
}

.priority {
  display: grid;
  gap: 14px;
  grid-template-columns: 1.18fr 0.82fr;
  margin-top: 16px;
}

.tick-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.tick-list li {
  display: inline-flex;
  align-items: flex-start;
  gap: 8px;
  color: #3f587e;
}

.tick-list li svg {
  width: 16px;
  height: 16px;
  color: var(--brand-2);
  margin-top: 4px;
  flex-shrink: 0;
}

.table-box {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

th,
td {
  text-align: left;
  padding: 12px 14px;
  font-size: 14px;
  border-bottom: 1px solid #e7edf8;
}

th {
  background: #f3f7ff;
  color: #1f3a63;
}

td {
  color: #455d81;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.steps li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.step {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  flex-shrink: 0;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #0f78ff, #0b56b2);
  margin-top: 2px;
}

.article {
  margin-top: 16px;
  display: grid;
  gap: 12px;
}

.article .block ul {
  margin: 10px 0 0;
  padding-left: 20px;
  color: #415a80;
}

.cta-box {
  margin-top: 16px;
  text-align: center;
  padding: 24px;
  background:
    linear-gradient(140deg, rgba(15, 120, 255, 0.1), rgba(20, 184, 166, 0.08)),
    #fff;
}

.cta-box h2 {
  margin: 0;
}

.cta-box p {
  margin: 8px 0 0;
  color: #52698d;
}

.cta-link {
  margin-top: 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  padding: 12px 24px;
  background: linear-gradient(135deg, #0f78ff, #0b56b2);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  box-shadow: 0 12px 22px rgba(15, 120, 255, 0.26);
}

.footer {
  margin-top: 54px;
  border-top: 1px solid var(--line);
  padding: 28px 0 34px;
  text-align: center;
  color: #4a6287;
  font-size: 14px;
}

.footer .safe {
  margin-bottom: 8px;
  font-weight: 700;
  color: #1c3962;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 980px) {
  .hero-wrap,
  .priority,
  .grid-3,
  .grid-4,
  .review-grid,
  .dual-grid,
  .log-grid {
    grid-template-columns: 1fr 1fr;
  }

  .grid-4 .card:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(1140px, calc(100% - 24px));
  }

  .header-inner {
    min-height: 68px;
    flex-direction: column;
    justify-content: center;
    padding: 10px 0;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
  }

  .nav a {
    flex: 1;
    text-align: center;
    padding: 8px 10px;
  }

  .hero {
    padding-top: 36px;
  }

  .hero-wrap,
  .priority,
  .grid-3,
  .grid-4,
  .review-grid,
  .dual-grid,
  .log-grid {
    grid-template-columns: 1fr;
  }

  .actions .btn,
  .platform-action {
    width: 100%;
  }
}