/* ============================================================
   海南里想奈科技有限公司官网 — 全站样式
   分区：Token → 基础 → 导航 → Hero → 通用区块 → 关于 → 服务
        → 联系 → 页脚 → 法律页 → 动效 → 响应式
   ============================================================ */

/* ---------- 设计 Token ---------- */
:root {
  --bg: #070c18;
  --bg-rgb: 7, 12, 24;
  --bg-2: #0b1322;
  --menu-bg: #0a101f;
  --menu-shadow: 0 24px 48px rgba(0, 0, 0, 0.5);
  --panel: rgba(147, 180, 235, 0.05);
  --panel-hover: rgba(147, 180, 235, 0.09);
  --line: rgba(147, 180, 235, 0.14);
  --line-strong: rgba(147, 180, 235, 0.28);

  --text-hi: #eef3fd;
  --text-mid: #a9b7d3;
  --text-low: #6d7c99;
  --ink-on-accent: #06101f;
  --ink-on-coral: #1c0f06;

  --blue: #4da3ff;
  --blue-rgb: 77, 163, 255;
  --aqua: #3ee6cf;
  --aqua-rgb: 62, 230, 207;
  --coral: #ff8a5c;
  --grad: linear-gradient(96deg, var(--blue), var(--aqua));

  --radius: 14px;
  --radius-sm: 10px;
  --nav-h: 64px;
  --section-gap: clamp(4.5rem, 10vw, 7.5rem);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas,
    "Liberation Mono", monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-mid);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
p,
ul {
  margin: 0;
}

ul {
  padding: 0;
  list-style: none;
}

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

::selection {
  background: var(--coral);
  color: var(--ink-on-coral);
}

:focus-visible {
  outline: 2px solid var(--aqua);
  outline-offset: 3px;
  border-radius: 2px;
}

.container {
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2rem);
}

.mono {
  font-family: var(--font-mono);
}

section[id] {
  scroll-margin-top: calc(var(--nav-h) + 12px);
}

/* ---------- 导航 ---------- */
.site-head {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(var(--bg-rgb), 0.82);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.brand-name {
  color: var(--text-hi);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.brand-sub {
  color: var(--aqua);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: clamp(1.2rem, 3vw, 2.2rem);
}

.nav-link {
  color: var(--text-mid);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  padding-block: 0.4rem;
  border-bottom: 2px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.nav-link:hover {
  color: var(--text-hi);
}

.nav-link.active {
  color: var(--text-hi);
  border-bottom-color: var(--aqua);
}

.lang-toggle {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--aqua);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0.32rem 0.95rem;
  cursor: pointer;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.lang-toggle:hover {
  border-color: var(--aqua);
  background: rgba(var(--aqua-rgb), 0.08);
}

html:not(.js) .lang-toggle {
  display: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 10px;
  background: transparent;
  border: 0;
  cursor: pointer;
}

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

.site-head.open .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-head.open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-head.open .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  overflow: hidden;
  background:
    radial-gradient(58rem 30rem at 82% -6%, rgba(var(--blue-rgb), 0.13), transparent 65%),
    radial-gradient(44rem 26rem at -12% 42%, rgba(var(--aqua-rgb), 0.07), transparent 60%),
    var(--bg);
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-inner {
  position: relative;
  width: 100%;
  padding-block: 4rem 7rem;
}

.eyebrow {
  color: var(--aqua);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
}

.hero-title {
  margin-top: 1.4rem;
  color: var(--text-hi);
  font-size: clamp(2.5rem, 6.8vw, 4.6rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: 0.03em;
}

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

.hero-sub {
  margin-top: 1.5rem;
  max-width: 34em;
  color: var(--text-mid);
  font-size: clamp(1.02rem, 1.6vw, 1.18rem);
}

.hero-cta {
  margin-top: 2.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-block;
  padding: 0.85em 1.9em;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
    border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.btn-primary {
  background: var(--grad);
  color: var(--ink-on-accent);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(var(--aqua-rgb), 0.28);
}

.btn-ghost {
  border: 1px solid var(--line-strong);
  color: var(--text-hi);
}

.btn-ghost:hover {
  border-color: var(--aqua);
  color: var(--aqua);
  transform: translateY(-2px);
}

.hero-tags {
  margin-top: 4.2rem;
  color: var(--text-low);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
}

/* ---------- 通用区块 ---------- */
.section {
  padding-block: var(--section-gap);
  border-top: 1px solid var(--line);
  background: var(--bg);
}

.section--tint {
  background: var(--bg-2);
}

.section-title {
  margin-top: 1rem;
  color: var(--text-hi);
  font-size: clamp(1.7rem, 3.6vw, 2.4rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.03em;
}

/* ---------- 关于我们 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
}

.about-body {
  display: grid;
  gap: 1.1rem;
  padding-top: 1.2rem;
}

.cap-list {
  margin-top: clamp(2.5rem, 6vw, 4rem);
}

.cap-item {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(1rem, 4vw, 3.5rem);
  padding-block: 1.5rem;
  border-top: 1px solid var(--line);
}

.cap-item h3 {
  position: relative;
  padding-left: 1.15rem;
  color: var(--text-hi);
  font-size: 1.18rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.cap-item h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background: var(--coral);
  border-radius: 2px;
}

/* ---------- 服务内容 ---------- */
.card-grid {
  margin-top: clamp(2.5rem, 6vw, 4rem);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.card {
  padding: 1.9rem 1.7rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease),
    background 0.3s var(--ease);
}

.card:hover {
  transform: translateY(-5px);
  border-color: rgba(var(--aqua-rgb), 0.4);
  background: var(--panel-hover);
}

.card-icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  color: var(--aqua);
  background: rgba(var(--aqua-rgb), 0.09);
  border: 1px solid rgba(var(--aqua-rgb), 0.22);
  border-radius: 12px;
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card h3 {
  margin-top: 1.3rem;
  color: var(--text-hi);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.card > p {
  margin-top: 0.6rem;
  font-size: 0.95rem;
}

.card-list {
  margin-top: 1.2rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 0.45rem;
}

.card-list li {
  position: relative;
  padding-left: 1.2rem;
  font-size: 0.9rem;
  color: var(--text-low);
}

.card-list li::before {
  content: "·";
  position: absolute;
  left: 0.2rem;
  color: var(--aqua);
  font-weight: 700;
}

/* ---------- 联系我们 ---------- */
.contact-grid {
  margin-top: clamp(2.5rem, 6vw, 4rem);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.contact-item h3 {
  margin-top: 1.3rem;
  color: var(--text-hi);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.contact-item p {
  margin-top: 0.5rem;
  font-size: 0.95rem;
  overflow-wrap: anywhere;
}

.contact-link {
  color: var(--aqua);
  border-bottom: 1px solid rgba(var(--aqua-rgb), 0.35);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.contact-link:hover {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--line);
  background: var(--bg);
  padding-block: 2.2rem;
}

.footer-inner {
  display: grid;
  gap: 0.5rem;
  justify-items: center;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-low);
}

.footer-links a {
  color: var(--text-mid);
  transition: color 0.25s var(--ease);
}

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

.footer-sep {
  margin-inline: 0.7rem;
  color: var(--text-low);
}

.footer-icp a {
  color: var(--text-low);
  transition: color 0.25s var(--ease);
}

.footer-icp a:hover {
  color: var(--aqua);
}

/* ---------- 法律页（privacy.html） ---------- */
.nav-menu-static {
  gap: 1.5rem;
}

.legal {
  padding-top: calc(var(--nav-h) + clamp(3rem, 8vw, 5rem));
  padding-bottom: var(--section-gap);
  max-width: 820px;
}

.legal-title {
  margin-top: 1rem;
  color: var(--text-hi);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: 0.03em;
}

.legal-updated {
  margin-top: 0.8rem;
  color: var(--text-low);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

.legal-section {
  margin-top: clamp(2.5rem, 6vw, 3.5rem);
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.legal-section h2 {
  color: var(--text-hi);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.legal-section h3 {
  margin-top: 1.8rem;
  color: var(--text-hi);
  font-size: 1.08rem;
  font-weight: 600;
}

.legal-section p {
  margin-top: 0.7rem;
  font-size: 0.96rem;
}

.legal-section a {
  color: var(--aqua);
  border-bottom: 1px solid rgba(var(--aqua-rgb), 0.35);
}

/* ---------- 首屏语言切换防闪烁 ----------
   head 内联脚本在 localStorage 记忆为 EN 时给 <html> 加 .lang-en，
   待 applyLang 替换完文案后移除；0.6s 动画兜底防止 JS 加载失败时文案永久隐藏 */
@keyframes i18n-swap-fallback {
  to {
    visibility: visible;
  }
}

html.lang-en [data-i18n],
html.lang-en [data-i18n-html] {
  visibility: hidden;
  animation: i18n-swap-fallback 0s 0.6s forwards;
}

/* ---------- 滚动显现动效 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}

html.js [data-reveal].revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 减弱动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  html.js [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .card-grid,
  .contact-grid {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }
}

@media (max-width: 767px) {
  /* 无 JS 兜底：菜单静态展开成可换行的一行，链接始终可达（CLAUDE.md 渐进增强要求） */
  html:not(.js) #site-head {
    height: auto;
  }

  html:not(.js) #site-head .nav-inner {
    flex-wrap: wrap;
    height: auto;
    min-height: var(--nav-h);
    padding-block: 0.55rem;
  }

  html:not(.js) #site-head .nav-menu {
    width: 100%;
    flex-wrap: wrap;
    gap: 0.2rem 1.2rem;
    padding-bottom: 0.4rem;
  }

  /* JS 可用：折叠为汉堡面板（仅首页 #site-head，privacy 的静态菜单不折叠） */
  html.js .nav-toggle {
    display: flex;
  }

  html.js #site-head .nav-menu {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.6rem 1.5rem 1.2rem;
    background: var(--menu-bg);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--menu-shadow);
  }

  html.js #site-head.open .nav-menu {
    display: flex;
  }

  html.js #site-head .nav-menu li {
    border-bottom: 1px solid var(--line);
  }

  html.js #site-head .nav-menu li:last-child {
    border-bottom: 0;
    padding-top: 1rem;
  }

  html.js #site-head .nav-link {
    display: block;
    padding-block: 0.9rem;
    border-bottom: 0;
  }

  .nav-link.active {
    color: var(--aqua);
  }

  .hero {
    min-height: auto;
  }

  .hero-inner {
    padding-block: 5rem;
  }

  .hero-tags {
    margin-top: 3rem;
  }

  .about-grid,
  .cap-item {
    grid-template-columns: 1fr;
    gap: 0.6rem;
  }

  .about-body {
    padding-top: 0.4rem;
  }
}