@import url("https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@600;700&family=Noto+Sans+SC:wght@400;500;600&display=swap");

:root {
  --navy: #0b1f3a;
  --navy-deep: #071526;
  --gold: #c9a227;
  --gold-soft: #e6d08a;
  --paper: #f7f4ee;
  --paper-dark: #efe8d8;
  --ink: #1a2433;
  --muted: #4a5564;
  --line: #d8d0c0;
  --white: #fffdf8;
  --max: 1080px;
}

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

html {
  scroll-behavior: auto;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 16px;
  line-height: 1.85;
}

img {
  max-width: 100%;
}

a {
  color: var(--navy);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--gold);
}

h1,
h2,
h3,
.brand-name,
.section-kicker {
  font-family: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--navy);
}

h1 {
  font-size: 2.05rem;
  line-height: 1.45;
  margin: 0 0 1rem;
}

h2 {
  font-size: 1.55rem;
  line-height: 1.5;
  margin: 0 0 0.75rem;
}

h3 {
  font-size: 1.15rem;
  line-height: 1.55;
  margin: 1.4rem 0 0.5rem;
}

p {
  margin: 0 0 1rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.wrap {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
}

/* —— 顶栏：整条海军蓝 —— */
.masthead {
  background: var(--navy);
  color: var(--white);
  border-bottom: 3px solid var(--gold);
}

.masthead-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--white);
  text-decoration: none;
}

.brand:hover {
  color: var(--gold-soft);
}

.brand-mark {
  display: block;
  flex-shrink: 0;
}

.brand-name {
  font-size: 1.25rem;
  color: inherit;
  letter-spacing: 0.12em;
}

.nav-toggle {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.nav-toggle-label {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--gold);
  color: var(--gold);
  cursor: pointer;
}

.site-nav ul {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  display: inline-block;
  color: #f3ead2;
  text-decoration: none;
  padding: 0.35rem 0;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover {
  color: var(--gold-soft);
  border-bottom-color: rgba(201, 162, 39, 0.45);
}

.site-nav a[aria-current="page"] {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* —— 主区 —— */
.hero {
  text-align: center;
  padding: 3.4rem 0 2.8rem;
  background:
    linear-gradient(180deg, #efe8d8 0%, var(--paper) 100%);
  border-bottom: 1px solid var(--line);
}

.hero-kicker {
  display: inline-block;
  margin-bottom: 0.8rem;
  color: var(--gold);
  font-family: "Noto Serif SC", "Songti SC", "STSong", serif;
  letter-spacing: 0.28em;
  font-size: 0.82rem;
}

.hero-rule {
  width: 72px;
  height: 2px;
  margin: 0 auto 1.2rem;
  background: var(--gold);
}

.hero .lead,
.section-lead {
  color: var(--muted);
}

.hero .lead {
  max-width: 40em;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.4rem;
}

.section {
  padding: 2.8rem 0;
  border-bottom: 1px solid var(--line);
}

.section-head {
  text-align: center;
  margin-bottom: 1.6rem;
}

.section-kicker {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--gold);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  font-weight: 600;
}

.section-head h2 {
  display: inline-block;
  padding-bottom: 0.45rem;
  border-bottom: 2px solid var(--gold);
}

/* 核心能力：长文栏，不是图标网格 */
.ability-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--navy);
  border-bottom: 1px solid var(--navy);
  margin-bottom: 0;
}

.ability-row + .ability-row {
  border-top: 0;
}

.ability {
  padding: 1.4rem 1.5rem 1.2rem;
}

.ability:first-child {
  border-right: 1px solid var(--line);
}

.ability h3 {
  margin-top: 0;
}

.ability-full {
  margin-top: 0;
  padding: 1.6rem 1.5rem 0.4rem;
  background: var(--white);
  border: 1px solid var(--navy);
  border-top: 0;
}

.ability-full h3 {
  margin-top: 0;
}

/* 四端纵向列表 */
.platform-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.platform-item {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 1.1rem;
  align-items: start;
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--line);
}

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

.platform-item h3 {
  margin: 0 0 0.4rem;
}

.platform-copy p {
  margin-bottom: 0;
}

.platform-icon {
  width: 48px;
  height: 48px;
  color: var(--navy);
}

/* 功能深讲：左金竖线 */
.deep-list {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}

.deep-item {
  padding: 0.15rem 0 0.15rem 1.15rem;
  border-left: 4px solid var(--gold);
}

.deep-item h3 {
  margin-top: 0;
}

/* 数字条 */
.stat-list {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.stat-bar {
  display: grid;
  grid-template-columns: 9.5rem 1fr 5.2rem;
  gap: 0.8rem;
  align-items: center;
}

.stat-name {
  font-family: "Noto Serif SC", "Songti SC", "STSong", serif;
  color: var(--navy);
  font-weight: 600;
}

.stat-track {
  height: 10px;
  background: var(--paper-dark);
  border: 1px solid var(--navy);
}

.stat-fill {
  display: block;
  height: 100%;
  background: var(--navy);
}

.stat-fill.is-gold {
  background: var(--gold);
}

.stat-num {
  text-align: right;
  font-family: "Noto Serif SC", "Songti SC", "STSong", serif;
  color: var(--navy);
  font-weight: 700;
}

/* 对比表 */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--navy);
}

.compare {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  font-size: 0.95rem;
}

.compare th,
.compare td {
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.compare th {
  background: var(--navy);
  color: var(--white);
  font-weight: 600;
}

.compare th:first-child,
.compare td:first-child {
  width: 22%;
  font-weight: 600;
  color: var(--navy);
}

.compare th:first-child {
  color: var(--gold-soft);
}

.compare tbody tr:nth-child(even) {
  background: #f3eee4;
}

.compare td.good {
  box-shadow: inset 3px 0 0 var(--gold);
}

/* 评价 */
.review-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.review {
  padding: 0 0 0 0.2rem;
  border-top: 1px solid var(--line);
  padding-top: 1.3rem;
}

.review:first-child {
  border-top: 1px solid var(--navy);
}

.review blockquote {
  margin: 0 0 0.7rem;
  padding: 0;
  border: 0;
}

.review footer {
  background: none;
  color: var(--muted);
  padding: 0;
  border: 0;
  font-size: 0.92rem;
}

.review cite {
  font-style: normal;
  font-family: "Noto Serif SC", "Songti SC", "STSong", serif;
  color: var(--navy);
  font-weight: 700;
}

/* FAQ */
.faq-list {
  margin: 0;
}

.faq-list details {
  border-bottom: 1px solid var(--line);
  padding: 0.85rem 0;
}

.faq-list details:first-child {
  border-top: 1px solid var(--navy);
}

.faq-list summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--navy);
  font-family: "Noto Serif SC", "Songti SC", "STSong", serif;
}

.faq-list details p {
  margin: 0.7rem 0 0.2rem;
  color: var(--muted);
}

/* 按钮 */
.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 44px;
  padding: 0.45rem 1.25rem;
  border: 1px solid var(--navy);
  background: var(--navy);
  color: var(--white);
  font: 500 0.95rem/1.3 "Noto Sans SC", "Microsoft YaHei", sans-serif;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--navy);
}

.btn-ghost {
  background: transparent;
  color: var(--navy);
}

.btn-ghost:hover {
  background: var(--navy);
  color: var(--white);
}

.btn-gold {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--navy);
}

.btn-gold:hover {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--gold-soft);
}

.btn:disabled {
  cursor: wait;
  opacity: 0.85;
}

/* 下载页模块 */
.promo-panel {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 2rem;
  align-items: start;
  padding: 1.6rem 0 0.4rem;
}

.promo-aside {
  padding: 1.1rem 1.15rem;
  background: var(--navy);
  color: #f3ead2;
}

.promo-aside h2,
.promo-aside p {
  color: inherit;
}

.promo-aside h2 {
  font-size: 1.1rem;
  margin-bottom: 0.6rem;
}

.step-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.step-list li {
  position: relative;
  padding: 0 0 1.3rem 3.2rem;
  border-left: 1px solid var(--line);
  margin-left: 0.7rem;
}

.step-list li:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.step-list li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: -0.75rem;
  top: 0.1rem;
  width: 1.5rem;
  height: 1.5rem;
  background: var(--navy);
  color: var(--gold);
  font-family: "Noto Serif SC", "Songti SC", "STSong", serif;
  font-size: 0.72rem;
  line-height: 1.5rem;
  text-align: center;
}

.step-list h3 {
  margin: 0 0 0.4rem;
}

.req-block + .req-block {
  margin-top: 1.3rem;
}

.changelog {
  margin: 0;
}

.changelog dt {
  font-family: "Noto Serif SC", "Songti SC", "STSong", serif;
  color: var(--navy);
  font-weight: 700;
  margin-top: 1rem;
}

.changelog dt:first-child {
  margin-top: 0;
}

.changelog dd {
  margin: 0.35rem 0 0;
  color: var(--muted);
}

/* 杂志长文 */
.magazine {
  padding-top: 2.4rem;
}

.magazine .article-meta {
  text-align: center;
  color: var(--gold);
  letter-spacing: 0.18em;
  font-size: 0.8rem;
  font-family: "Noto Serif SC", "Songti SC", "STSong", serif;
  margin-bottom: 0.6rem;
}

.magazine h1 {
  text-align: center;
}

.magazine .deck {
  text-align: center;
  max-width: 38em;
  margin: 0 auto 1.6rem;
  color: var(--muted);
}

.magazine .article-body {
  max-width: 42em;
  margin: 0 auto;
}

.magazine .article-body h2 {
  margin-top: 2rem;
  padding-top: 0.4rem;
  border-top: 1px solid var(--line);
}

.magazine .article-body h2:first-child {
  border-top: 0;
}

.cta-band {
  text-align: center;
  margin: 2rem 0;
  padding: 1.4rem 1rem;
  background: var(--navy);
  color: #f3ead2;
}

.cta-band h2,
.cta-band p {
  color: inherit;
}

.cta-band h2 {
  font-size: 1.25rem;
}

.cta-band .btn-gold {
  margin-top: 0.4rem;
}

/* 页脚 */
.site-footer {
  background: var(--navy-deep);
  color: #d7cba8;
  padding: 2rem 0 1.6rem;
  border-top: 3px solid var(--gold);
}

.site-footer .brand-name {
  color: var(--gold-soft);
  margin-bottom: 0.6rem;
}

.site-footer a {
  color: var(--gold-soft);
}

.footer-nav {
  display: flex;
  gap: 1.4rem;
  margin: 0.8rem 0 1.1rem;
}

.footer-nav a {
  text-decoration: none;
}

.footer-verify {
  margin: 0 0 0.7rem;
}

.footer-copy {
  margin: 0;
  font-size: 0.88rem;
  color: #b7ad8f;
}

/* 下载 loading */
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 800px) {
  h1 {
    font-size: 1.55rem;
  }

  .nav-toggle-label {
    display: flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 75px;
    background: var(--navy-deep);
    padding: 0.6rem 1rem 1rem;
    z-index: 20;
  }

  .nav-toggle:checked ~ .site-nav {
    display: block;
  }

  .masthead {
    position: relative;
  }

  .site-nav ul {
    flex-direction: column;
    gap: 0.4rem;
  }

  .ability-row,
  .promo-panel,
  .stat-bar,
  .platform-item {
    grid-template-columns: 1fr;
  }

  .ability:first-child {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .platform-item .btn {
    justify-self: start;
  }

  .stat-name,
  .stat-num {
    text-align: left;
  }
}