/* ==========================================================================
   站点设计系统
   纯 CSS，无框架依赖；全部使用系统字体，零外部资源请求。
   ========================================================================== */

:root {
  /* 色板（沿用线上深色科技风） */
  --c-bg: #1b1c23;
  --c-bg-2: #202128;
  --c-bg-3: #2f313a;
  --c-footer: #15161c;
  --c-light: #f6f7fb;
  --c-white: #ffffff;
  --c-text: #e9eaf0;
  --c-text-muted: #a5a6a9;
  --c-dark-text: #1f2330;
  --c-dark-muted: #5c6170;
  --c-primary: #5283ff;
  --c-primary-2: #3f6ff0;
  --c-violet: #7b5cff;
  --c-violet-2: #a16bff;
  --c-line: rgba(255, 255, 255, 0.08);
  --c-line-light: #e4e6ee;
  --grad: linear-gradient(135deg, #5283ff 0%, #8b5cf6 100%);

  /* 字体：系统字体栈 */
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 间距与尺寸 */
  --container: 1140px;
  --gutter: 20px;
  --radius: 14px;
  --radius-sm: 8px;
  --nav-h: 64px;
  --shadow: 0 10px 40px rgba(16, 20, 40, 0.14);
  --shadow-dark: 0 20px 60px rgba(0, 0, 0, 0.45);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-bg);
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img,
svg {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: var(--c-primary);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--c-violet-2);
}
h1,
h2,
h3,
h4,
h5 {
  margin: 0 0 0.5em;
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: 0.01em;
}
h1 {
  font-size: clamp(30px, 5vw, 52px);
}
h2 {
  font-size: clamp(26px, 3.6vw, 38px);
}
h3 {
  font-size: clamp(19px, 2.2vw, 24px);
}
h4 {
  font-size: 18px;
}
p {
  margin: 0 0 1em;
}
ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
button {
  font: inherit;
  cursor: pointer;
}
input,
textarea,
select {
  font: inherit;
}
:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 3px;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- 布局 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.section {
  padding: clamp(64px, 9vw, 110px) 0;
  position: relative;
}
.section--light {
  background: var(--c-light);
  color: var(--c-dark-text);
}
.section--white {
  background: var(--c-white);
  color: var(--c-dark-text);
}
.section--dark2 {
  background: var(--c-bg-2);
}
.section--cta {
  display: flex;
  align-items: center;
  justify-content: center;
}
.section--cta > .container {
  width: 100%;
}
.muted {
  color: var(--c-text-muted);
}
.section-head {
  max-width: 720px;
  margin: 0 auto clamp(36px, 5vw, 64px);
  text-align: center;
}
.section-head .eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--c-primary);
  margin-bottom: 12px;
}
.section-head p {
  font-size: 17px;
}
.grid {
  display: grid;
  gap: 24px;
}
.grid--2 {
  grid-template-columns: repeat(2, 1fr);
}
.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}
.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}
@media (max-width: 992px) {
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 600px) {
  .grid--4,
  .grid--3,
  .grid--2 {
    grid-template-columns: 1fr;
  }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.2;
  transition: transform 0.25s var(--ease), box-shadow 0.25s, background 0.25s,
    color 0.25s, border-color 0.25s;
  white-space: nowrap;
}
.btn:hover {
  transform: translateY(-2px);
}
.btn--primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 8px 24px rgba(82, 131, 255, 0.35);
}
.btn--primary:hover {
  color: #fff;
  box-shadow: 0 12px 32px rgba(123, 92, 255, 0.45);
}
.btn--ghost {
  border-color: rgba(255, 255, 255, 0.25);
  color: var(--c-text);
}
.btn--ghost:hover {
  border-color: var(--c-primary);
  color: #fff;
  background: rgba(82, 131, 255, 0.12);
}
.section--light .btn--ghost,
.section--white .btn--ghost {
  border-color: var(--c-line-light);
  color: var(--c-dark-text);
}
.section--light .btn--ghost:hover,
.section--white .btn--ghost:hover {
  color: var(--c-primary);
  background: rgba(82, 131, 255, 0.08);
}
.btn--sm {
  padding: 9px 18px;
  font-size: 14px;
}
.btn .arrow {
  width: 16px;
  height: 16px;
  transition: transform 0.25s var(--ease);
}
.btn:hover .arrow {
  transform: translateX(3px);
}
.link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 15px;
}
.link-more svg {
  width: 14px;
  height: 14px;
  transition: transform 0.25s var(--ease);
}
.link-more:hover svg {
  transform: translateX(3px);
}

/* ---------- 导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(27, 28, 35, 0.82);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--c-line);
  transition: background 0.3s, box-shadow 0.3s;
}
.site-header.is-scrolled {
  background: rgba(21, 22, 28, 0.95);
  box-shadow: 0 6px 30px rgba(0, 0, 0, 0.35);
}
.nav {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
}
.brand:hover {
  color: #fff;
}
.brand img {
  height: 32px;
  width: auto;
}
.brand small {
  display: block;
  font-size: 11px;
  font-weight: 500;
  color: var(--c-text-muted);
  letter-spacing: 0.08em;
  line-height: 1.1;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-menu a {
  display: block;
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--c-text);
  font-size: 15px;
  font-weight: 500;
  position: relative;
}
.nav-menu a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}
.nav-menu a.is-active {
  color: #fff;
}
.nav-menu a.is-active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad);
}
.nav-menu .btn {
  margin-left: 10px;
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  border-radius: 8px;
  position: relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 11px;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.2s, top 0.3s;
}
.nav-toggle span {
  top: 21px;
}
.nav-toggle span::before {
  left: 0;
  top: -7px;
}
.nav-toggle span::after {
  left: 0;
  top: 7px;
}
.nav-toggle[aria-expanded="true"] span {
  background: transparent;
}
.nav-toggle[aria-expanded="true"] span::before {
  top: 0;
  transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span::after {
  top: 0;
  transform: rotate(-45deg);
}
@media (max-width: 992px) {
  .nav-toggle {
    display: block;
  }
  .nav-menu {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 12px 16px 20px;
    background: rgba(21, 22, 28, 0.98);
    border-bottom: 1px solid var(--c-line);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s var(--ease), opacity 0.25s, visibility 0.25s;
    max-height: calc(100vh - var(--nav-h));
    overflow-y: auto;
  }
  .nav-menu.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-menu a {
    padding: 14px 12px;
    font-size: 16px;
  }
  .nav-menu a.is-active::after {
    display: none;
  }
  .nav-menu a.is-active {
    color: var(--c-primary);
  }
  .nav-menu .btn {
    margin: 10px 0 0;
    justify-content: center;
  }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--nav-h) + clamp(56px, 10vw, 120px)) 0 clamp(64px, 9vw, 110px);
  background: radial-gradient(1200px 600px at 80% -10%, rgba(123, 92, 255, 0.22), transparent 60%),
    radial-gradient(800px 500px at 0% 100%, rgba(82, 131, 255, 0.16), transparent 60%),
    var(--c-bg);
  overflow: hidden;
}
.hero::before {
  /* 细网格 */
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero .container {
  position: relative;
  z-index: 1;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(32px, 6vw, 72px);
  align-items: center;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--c-primary);
  background: rgba(82, 131, 255, 0.12);
  border: 1px solid rgba(82, 131, 255, 0.3);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero-eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-primary);
  box-shadow: 0 0 0 4px rgba(82, 131, 255, 0.25);
}
.hero h1 {
  margin-bottom: 18px;
  font-size: clamp(28px, 4.3vw, 46px);
}
.hero h1 .accent {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .lead {
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--c-text-muted);
  max-width: 560px;
  margin-bottom: 28px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}
.hero-art {
  position: relative;
}
.hero-art img {
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
  filter: drop-shadow(0 30px 60px rgba(82, 131, 255, 0.25));
  animation: float 7s ease-in-out infinite;
}
@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-14px);
  }
}
@media (prefers-reduced-motion: reduce) {
  .hero-art img {
    animation: none;
  }
  html {
    scroll-behavior: auto;
  }
}
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero .lead {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-art {
    order: -1;
  }
  .hero-art img {
    max-width: 380px;
  }
}

/* 漂浮装饰（替代原 sebg_2/3/4 图） */
.deco {
  position: absolute;
  pointer-events: none;
  opacity: 0.7;
  z-index: 0;
  height: auto;
}
.deco--1 {
  top: 12%;
  right: 6%;
  width: 90px;
  animation: spin 40s linear infinite;
}
.deco--2 {
  bottom: 10%;
  left: 4%;
  width: 120px;
  animation: spin 60s linear infinite reverse;
}
.deco--3 {
  top: 30%;
  left: 45%;
  width: 60px;
  animation: float 9s ease-in-out infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
@media (max-width: 992px) {
  .deco--3 {
    display: none;
  }
}

/* 关键词清单（首页 A–G） */
.kw-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 20px;
  margin: 0 0 24px;
}
.kw-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  color: var(--c-text-muted);
}
.kw-list b {
  flex: none;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  display: inline-grid;
  place-items: center;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  background: rgba(82, 131, 255, 0.18);
  border: 1px solid rgba(82, 131, 255, 0.35);
}
.kw-list a {
  color: inherit;
}
.kw-list a:hover {
  color: #fff;
}
@media (max-width: 992px) {
  .kw-list {
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
    text-align: left;
  }
}
@media (max-width: 480px) {
  .kw-list {
    grid-template-columns: 1fr;
  }
  .btn {
    white-space: normal;
    text-align: center;
  }
}

/* 统计数字 */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.stat {
  padding: 22px 20px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--c-line);
  text-align: center;
}
.stat strong {
  display: block;
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 800;
  letter-spacing: -0.01em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.1;
  margin-bottom: 6px;
}
.stat span {
  font-size: 14px;
  color: var(--c-text-muted);
}
.section--light .stat,
.section--white .stat {
  background: #fff;
  border-color: var(--c-line-light);
  box-shadow: 0 4px 16px rgba(20, 30, 60, 0.05);
}
.section--light .stat span,
.section--white .stat span {
  color: var(--c-dark-muted);
}
@media (max-width: 768px) {
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  padding: 30px 26px;
  border-radius: var(--radius);
  background: var(--c-bg-3);
  border: 1px solid var(--c-line);
  transition: transform 0.3s var(--ease), box-shadow 0.3s, border-color 0.3s;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(82, 131, 255, 0.45);
  box-shadow: var(--shadow-dark);
}
.card .icon {
  width: 64px;
  height: 64px;
  margin-bottom: 18px;
}
.card h3,
.card h4 {
  margin-bottom: 10px;
}
.card p {
  color: var(--c-text-muted);
  font-size: 15px;
  margin: 0;
}
.card .link-more {
  margin-top: 18px;
}
.card--center {
  text-align: center;
  align-items: center;
}
.card--glow::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(123, 92, 255, 0.35), transparent 70%);
  pointer-events: none;
}
.section--light .card,
.section--white .card {
  background: #fff;
  border-color: var(--c-line-light);
  box-shadow: 0 4px 20px rgba(20, 30, 60, 0.06);
}
.section--light .card:hover,
.section--white .card:hover {
  box-shadow: var(--shadow);
  border-color: rgba(82, 131, 255, 0.4);
}
.section--light .card p,
.section--white .card p {
  color: var(--c-dark-muted);
}
.card-bgicon {
  position: absolute;
  right: -10px;
  bottom: -10px;
  width: 120px;
  height: auto;
  opacity: 0.08;
  pointer-events: none;
}
a.card {
  color: inherit;
}
a.card:hover {
  color: inherit;
}

/* 关键词方案网格（页脚关键词的落点） */
.kw-card {
  padding: 22px 20px;
  scroll-margin-top: calc(var(--nav-h) + 24px);
}
.kw-card h3 {
  font-size: 17px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.kw-card h3::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--grad);
  flex: none;
}
.kw-card p {
  font-size: 14px;
}

/* ---------- 图文特性区 ---------- */
.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 6vw, 80px);
  align-items: center;
  padding: clamp(28px, 5vw, 56px) 0;
  scroll-margin-top: var(--nav-h);
}
.feature + .feature {
  border-top: 1px solid var(--c-line-light);
}
.section:not(.section--light):not(.section--white) .feature + .feature {
  border-top-color: var(--c-line);
}
.feature--reverse .feature-art {
  order: 2;
}
.feature-art {
  display: flex;
  justify-content: center;
}
.feature-art img {
  width: 100%;
  max-width: 440px;
}
.feature-body .eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--c-primary);
  margin-bottom: 10px;
}
.feature-body h2,
.feature-body h3 {
  margin-bottom: 14px;
}
.feature-body p {
  color: var(--c-dark-muted);
  font-size: 16px;
}
.section:not(.section--light):not(.section--white) .feature-body p {
  color: var(--c-text-muted);
}
.checklist {
  margin: 18px 0 22px;
  display: grid;
  gap: 10px;
}
.checklist li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 15px;
}
.checklist li::before {
  content: "";
  flex: none;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  border-radius: 50%;
  background: var(--grad);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='none' stroke='%23000' stroke-width='3' stroke-linecap='round' stroke-linejoin='round' d='M5 12.5l4.5 4.5L19 7'/%3E%3C/svg%3E")
    center/14px no-repeat,
    linear-gradient(#000, #000);
  -webkit-mask-composite: xor;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='none' stroke='%23000' stroke-width='3' stroke-linecap='round' stroke-linejoin='round' d='M5 12.5l4.5 4.5L19 7'/%3E%3C/svg%3E")
    center/14px no-repeat,
    linear-gradient(#000, #000);
  mask-composite: exclude;
}
@media (max-width: 860px) {
  .feature {
    grid-template-columns: 1fr;
  }
  .feature--reverse .feature-art {
    order: 0;
  }
  .feature-art img {
    max-width: 340px;
  }
}

/* ---------- 流程步骤 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 28px 24px 24px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--c-line-light);
  counter-increment: step;
}
.step::before {
  content: counter(step, decimal-leading-zero);
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-primary);
  margin-bottom: 10px;
  font-family: var(--mono);
}
.step .icon {
  width: 56px;
  height: 56px;
  position: absolute;
  right: 20px;
  top: 20px;
  opacity: 0.9;
}
.step h3 {
  font-size: 19px;
}
.step p {
  color: var(--c-dark-muted);
  font-size: 15px;
  margin: 0;
}
.steps--4 {
  grid-template-columns: repeat(4, 1fr);
}
@media (max-width: 992px) {
  .steps--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 860px) {
  .steps {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 600px) {
  .steps--4 {
    grid-template-columns: 1fr;
  }
}

/* 数据来源标签 */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.chip {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--c-line);
  background: rgba(255, 255, 255, 0.04);
  font-size: 14px;
  color: var(--c-text);
}
.section--light .chip,
.section--white .chip {
  background: #fff;
  border-color: var(--c-line-light);
  color: var(--c-dark-text);
}

/* ---------- FAQ ---------- */
.faq {
  max-width: 820px;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}
.faq details {
  border-radius: var(--radius-sm);
  background: #fff;
  border: 1px solid var(--c-line-light);
  padding: 0 20px;
}
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 36px 18px 0;
  font-weight: 600;
  font-size: 16px;
  position: relative;
  color: var(--c-dark-text);
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::after {
  content: "";
  position: absolute;
  right: 4px;
  top: 50%;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--c-primary);
  border-bottom: 2px solid var(--c-primary);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 0.25s;
}
.faq details[open] summary::after {
  transform: translateY(-30%) rotate(-135deg);
}
.faq details p {
  color: var(--c-dark-muted);
  font-size: 15px;
  padding-bottom: 18px;
  margin: 0;
}

/* ---------- CTA 横幅 ---------- */
.cta {
  position: relative;
  overflow: hidden;
  border-radius: 22px;
  padding: clamp(36px, 6vw, 64px) clamp(24px, 5vw, 64px);
  background: radial-gradient(800px 300px at 90% 0%, rgba(161, 107, 255, 0.35), transparent 60%),
    radial-gradient(600px 300px at 0% 100%, rgba(82, 131, 255, 0.35), transparent 60%),
    var(--c-bg-3);
  border: 1px solid rgba(82, 131, 255, 0.25);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 24px;
  align-items: center;
  color: #fff;
}
.cta h2 {
  margin-bottom: 10px;
}
.cta p {
  color: var(--c-text-muted);
  margin: 0;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}
@media (max-width: 860px) {
  .cta {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .cta-actions {
    justify-content: center;
  }
}

/* ---------- 价值观（关于我们） ---------- */
.value {
  padding: 32px 28px;
}
.value .en {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--c-primary);
  margin-bottom: 8px;
  display: block;
}
.value h3 {
  font-size: 22px;
}

/* ---------- 联系方式与表单 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: clamp(28px, 5vw, 60px);
  align-items: start;
}
.contact-list {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}
.contact-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.contact-list img {
  width: 40px;
  height: 40px;
  flex: none;
}
.contact-list b {
  display: block;
  font-size: 14px;
  color: var(--c-dark-muted);
  font-weight: 500;
}
.contact-list span,
.contact-list a {
  font-size: 17px;
  font-weight: 600;
  color: var(--c-dark-text);
}
.contact-list a:hover {
  color: var(--c-primary);
}
.form {
  background: #fff;
  border: 1px solid var(--c-line-light);
  border-radius: var(--radius);
  padding: clamp(22px, 3vw, 34px);
  box-shadow: 0 4px 20px rgba(20, 30, 60, 0.06);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-field {
  display: grid;
  gap: 6px;
  margin-bottom: 16px;
}
.form-field label {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-dark-text);
}
.form-field label i {
  color: #e5484d;
  font-style: normal;
}
.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-line-light);
  background: #fafbfe;
  color: var(--c-dark-text);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-field textarea {
  min-height: 120px;
  resize: vertical;
}
.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(82, 131, 255, 0.18);
}
.form-hint {
  font-size: 13px;
  color: var(--c-dark-muted);
  margin: 0 0 12px;
}
.form-msg {
  display: none;
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
}
.form-msg.is-ok {
  display: block;
  background: #e8f7ee;
  color: #1a7f45;
}
.form-msg.is-err {
  display: block;
  background: #fdecec;
  color: #b42318;
}
.form-msg p {
  margin: 0 0 10px;
}
.form-msg .btn {
  margin-top: 2px;
}
.form-msg pre {
  margin: 12px 0 0;
  white-space: pre-wrap;
  font: inherit;
}
.hp {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  width: 0;
  overflow: hidden;
}
@media (max-width: 860px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 520px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* ---------- 弹层（咨询表单） ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(10, 11, 16, 0.7);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.modal.is-open {
  display: flex;
}
.modal-dialog {
  width: 100%;
  max-width: 560px;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  background: #fff;
  color: var(--c-dark-text);
  border-radius: 18px;
  padding: 28px 28px 24px;
  position: relative;
  animation: pop 0.3s var(--ease);
}
@keyframes pop {
  from {
    transform: translateY(16px) scale(0.98);
    opacity: 0;
  }
  to {
    transform: none;
    opacity: 1;
  }
}
.modal-dialog h3 {
  margin-bottom: 6px;
}
.modal-dialog .form {
  border: 0;
  padding: 0;
  box-shadow: none;
}
.modal-close {
  position: absolute;
  right: 14px;
  top: 14px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 0;
  background: var(--c-light);
  color: var(--c-dark-text);
  font-size: 20px;
  line-height: 1;
}
.modal-close:hover {
  background: #e9ebf3;
}
.modal-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--c-line-light);
  font-size: 14px;
  color: var(--c-dark-muted);
}
.modal-contact a {
  font-weight: 600;
}
body.modal-open {
  overflow: hidden;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--c-footer);
  border-top: 1px solid var(--c-line);
  padding: clamp(48px, 6vw, 72px) 0 28px;
  color: var(--c-text-muted);
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 32px;
}
.footer-brand .brand {
  margin-bottom: 14px;
}
.footer-brand p {
  margin-bottom: 10px;
  max-width: 360px;
}
.footer-brand .tel {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
}
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 14px;
}
.footer-col li {
  margin-bottom: 8px;
}
.footer-col a {
  color: var(--c-text-muted);
}
.footer-col a:hover {
  color: #fff;
}
.footer-bottom {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--c-line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
}
.footer-bottom a {
  color: var(--c-text-muted);
}
@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 560px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* 移动端底部快捷联系条 */
.quickbar {
  display: none;
}
@media (max-width: 768px) {
  .quickbar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 90;
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: rgba(21, 22, 28, 0.96);
    border-top: 1px solid var(--c-line);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    padding-bottom: env(safe-area-inset-bottom);
  }
  .quickbar a,
  .quickbar button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 10px;
    color: #fff;
    font-weight: 600;
    font-size: 15px;
    border: 0;
    background: transparent;
  }
  .quickbar button {
    background: var(--grad);
  }
  .quickbar img {
    width: 20px;
    height: 20px;
  }
  body {
    padding-bottom: 52px;
  }
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--c-text-muted);
  margin-bottom: 18px;
}
.breadcrumb a {
  color: var(--c-text-muted);
}
.breadcrumb a:hover {
  color: #fff;
}
.breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  opacity: 0.5;
}
@media (max-width: 992px) {
  .breadcrumb {
    justify-content: center;
  }
}

/* ---------- 滚动显现 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}
.reveal[data-delay="1"] {
  transition-delay: 0.08s;
}
.reveal[data-delay="2"] {
  transition-delay: 0.16s;
}
.reveal[data-delay="3"] {
  transition-delay: 0.24s;
}
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* 首页图标：必须内联才播，img 里的 SVG 动画不会动 */
.m { transform-box: fill-box; transform-origin: center; }
.m-bob { animation: m-bob 2.6s ease-in-out infinite; }
.m-dot { animation: m-dot 1.8s ease-in-out infinite; }
.m-wave { fill: none; stroke: #8b6cff; stroke-width: 1.6; stroke-linecap: round; animation: m-wave 1.8s ease-out infinite; }
.m-wave2 { animation-delay: .45s; }
.m-star { animation: m-star 2.4s ease-in-out infinite; }
.m-spark { fill: #8b6cff; animation: m-spark 2.4s ease-in-out infinite; }
.m-spark2 { animation-delay: .8s; }
.m-flow { animation: m-flow 1.6s ease-in-out infinite; }
.m-rim { animation: m-dot 2.2s ease-in-out infinite; }
.m-left { animation: m-left 1.8s ease-in-out infinite; }
.m-right { animation: m-right 1.8s ease-in-out infinite; }
.m-blink { animation: m-blink 1.2s steps(1, end) infinite; }
.m-type { stroke-dasharray: 18; animation: m-type 2.2s ease-in-out infinite; }
.m-type2 { animation-delay: .35s; }
.m-lamp { animation: m-dot 1.6s ease-in-out infinite; }
.m-lamp2 { animation-delay: .35s; }
.m-rise { transform-origin: center bottom; animation: m-rise 1.8s ease-in-out infinite; }
.m-rise2 { animation-delay: .15s; }
.m-rise3 { animation-delay: .3s; }
.m-draw { stroke-dasharray: 78; animation: m-draw 2.2s ease-in-out infinite; }
.m-pick { animation: m-pick 3.6s ease-in-out infinite; }
.m-pick2 { animation-delay: .5s; }
.m-pick3 { animation-delay: 1s; }
.m-pin { animation: m-dot 2.4s ease-in-out infinite; }
.m-pin2 { animation-delay: .4s; }
.m-pin3 { animation-delay: .8s; }
.m-tick { stroke-dasharray: 32; animation: m-tick 2.8s ease-in-out infinite; }
.ill-motion { width: 300px; height: 225px; flex: 0 1 300px; }
@keyframes m-bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-3px); } }
@keyframes m-dot { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }
@keyframes m-wave { 0% { opacity: 0; } 35% { opacity: .9; } 100% { opacity: 0; } }
@keyframes m-star { 0%, 100% { transform: scale(1) rotate(0deg); } 50% { transform: scale(1.08) rotate(-8deg); } }
@keyframes m-spark { 0%, 100% { opacity: 0; transform: scale(.4); } 45%, 62% { opacity: 1; transform: scale(1); } }
@keyframes m-flow { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(4px); } }
@keyframes m-left { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(-3px); } }
@keyframes m-right { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(3px); } }
@keyframes m-blink { 0%, 45% { opacity: 1; } 50%, 100% { opacity: .15; } }
@keyframes m-type { 0% { stroke-dashoffset: 18; } 45%, 100% { stroke-dashoffset: 0; } }
@keyframes m-rise { 0%, 100% { transform: scaleY(.42); } 50% { transform: scaleY(1); } }
@keyframes m-draw { 0% { stroke-dashoffset: 78; } 55%, 100% { stroke-dashoffset: 0; } }
@keyframes m-pick { 0%, 100% { opacity: .45; transform: translateY(0); } 40% { opacity: 1; transform: translateY(-6px); } }
@keyframes m-tick { 0% { stroke-dashoffset: 32; } 35%, 75% { stroke-dashoffset: 0; } 100% { stroke-dashoffset: 32; } }
@media (prefers-reduced-motion: reduce) {
  .m-bob, .m-dot, .m-wave, .m-star, .m-spark, .m-flow, .m-rim, .m-left, .m-right, .m-blink, .m-type, .m-lamp, .m-rise, .m-draw, .m-pick, .m-pin, .m-tick {
    animation: none;
  }
  .m-draw, .m-tick, .m-type { stroke-dashoffset: 0; }
}

/* ---------- 404 ---------- */
.page-404 {
  min-height: 100vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 120px 20px 80px;
}
/* ---------- 资讯 ---------- */
.news-list {
  display: grid;
  gap: 20px;
}
.news-card {
  display: block;
  color: inherit;
}
.news-card:hover {
  color: inherit;
}
.news-card time,
.article-meta time {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--c-primary);
}
.article-wrap {
  width: min(760px, 100%);
  max-width: 760px;
  margin: 0 auto;
}
.prose {
  overflow-wrap: break-word;
}
.prose figure {
  margin: 0 0 1.4em;
}
.prose figure img {
  display: block;
  width: 100%;
  max-width: 560px;
  height: auto;
}
.prose figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--c-dark-muted);
}
.prose .table-wrap {
  max-width: 100%;
  margin: 0 0 1.2em;
  overflow-x: auto;
}
.prose table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 15px;
}
.prose th,
.prose td {
  border: 1px solid var(--c-line-light);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}
.prose th {
  background: var(--c-light);
  font-weight: 600;
}
.article-meta {
  margin-bottom: 28px;
  font-size: 14px;
  color: var(--c-dark-muted);
}
.prose code {
  overflow-wrap: anywhere;
  word-break: break-word;
}
.prose h2 {
  margin-top: 1.6em;
}
.prose p,
.prose li {
  font-size: 17px;
}
.prose .checklist {
  margin: 0 0 1.2em;
}
.prose .checklist li {
  margin-bottom: 8px;
}

.page-404 .code {
  font-size: clamp(80px, 16vw, 160px);
  font-weight: 800;
  line-height: 1;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- 工具类 ---------- */
.text-center {
  text-align: center;
}
.mt-0 {
  margin-top: 0;
}
.mt-40 {
  margin-top: 40px;
}
.mb-0 {
  margin-bottom: 0;
}
.mw-720 {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}