/* ============================================================
   优鲜链官网 · 样式表（浅色主题）
   设计语言沿用首屏参考稿：浅底（#FFF / #F9F8FC）、深靛文字 #1B133C、
   橙色点缀 #F97316、玻璃拟态卡片、大留白 + 柔和阴影；标题混排
   Instrument Serif（西文）与系统黑体（中文）。
   目录：1 变量  2 基础  3 通用件  4 导航  5 首屏  6 章节  7 卡片
        8 业务闭环  9 智能亮点  10 产品界面  11 会员方案  12 底部区
        13 咨询弹窗  14 动效  15 响应式
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root {
  --bg: #ffffff;
  --bg-2: #f7f6fb;
  --panel: rgba(255, 255, 255, 0.78);
  --panel-solid: #ffffff;
  --line: rgba(27, 19, 60, 0.08);
  --line-2: rgba(27, 19, 60, 0.16);

  --ink: #1b133c;
  --dim: rgba(27, 19, 60, 0.72);
  --faint: rgba(27, 19, 60, 0.54);

  /* 品牌蓝：与后台系统主色呼应，用在图标、编号、选中态等「信息层」 */
  --brand: #0284c7;
  --brand-2: #0ea5e9;
  --brand-soft: rgba(14, 165, 233, 0.13);
  /* 主题橙：只留给转化入口与强调标签，一屏内不出现第三种强调色 */
  --acc: #f97316;
  --acc-2: #fb923c;
  --acc-soft: rgba(249, 115, 22, 0.12);
  --grad: linear-gradient(100deg, #f97316 0%, #fb923c 55%, #f59e0b 100%);
  --grad-brand: linear-gradient(135deg, #38bdf8 0%, #0ea5e9 52%, #0284c7 100%);

  --r-sm: 10px;
  --r: 14px;
  --r-lg: 20px;
  --r-xl: 28px;

  /* 阴影统一「近距细影 + 远距柔影」两层，单层大黑影会把浅色界面压脏 */
  --shadow-xs: 0 1px 2px rgba(27, 19, 60, 0.06);
  --shadow-sm: 0 1px 2px rgba(27, 19, 60, 0.05), 0 4px 12px -6px rgba(27, 19, 60, 0.12);
  --shadow: 0 2px 4px rgba(27, 19, 60, 0.04), 0 14px 32px -16px rgba(27, 19, 60, 0.2);
  --shadow-lg: 0 4px 10px rgba(27, 19, 60, 0.05), 0 30px 60px -28px rgba(27, 19, 60, 0.3);
  --shadow-btn: 0 1px 2px rgba(27, 19, 60, 0.12), 0 8px 20px -10px rgba(27, 19, 60, 0.32);
  --inset-hi: inset 0 1px 0 rgba(255, 255, 255, 0.9);
  --glass: blur(20px) saturate(180%);

  --wrap: 1180px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);

  --font: 'Inter', 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', system-ui,
    -apple-system, 'Segoe UI', Roboto, sans-serif;
  /* 西文走 Instrument Serif，中文字形自动落到后面的中文字体（未单独引入 Noto Serif SC，
     避免中文字体动辄数 MB 的分片下载） */
  --font-serif: 'Instrument Serif', 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei',
    Georgia, serif;
  --mono: ui-monospace, 'SFMono-Regular', Menlo, Consolas, 'Liberation Mono', monospace;
}

/* ---------- 2. 基础重置 ---------- */
* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, p, ul { margin: 0; }
ul { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img { max-width: 100%; display: block; }
code { font-family: var(--mono); font-size: 0.92em; }
::selection { background: rgba(249, 115, 22, 0.22); }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

.grad {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
/* 渐变色块整体不拆行，否则「货、单、钱」会被拆成两行留一个孤字；
   同时让渐变缓慢流动（原设计有，重写时漏了关键帧） */
.grad--flow {
  white-space: nowrap;
  background-size: 220% auto;
  animation: gradflow 7s linear infinite;
}
@keyframes gradflow {
  to { background-position: 220% center; }
}

/* 键盘可达性：统一焦点环（鼠标点击不出现，仅键盘 Tab 时可见） */
:focus-visible {
  outline: 2px solid var(--brand-2);
  outline-offset: 2px;
  border-radius: 8px;
}

/* ---------- 3. 通用件：按钮 / 徽章 / 网格 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--r);
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease),
    background 0.22s var(--ease), border-color 0.22s var(--ease), color 0.22s var(--ease);
}
.btn svg { width: 16px; height: 16px; }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn--sm { padding: 8px 15px; font-size: 14px; }
.btn--lg { padding: 14px 26px; font-size: 16px; }

/* 主按钮：深靛实心 + 顶部内高光（浅色区） */
.btn--primary {
  background: linear-gradient(180deg, #2a2050 0%, var(--ink) 100%);
  color: #fff;
  box-shadow: var(--shadow-btn), inset 0 1px 0 rgba(255, 255, 255, 0.16);
}
.btn--primary:hover {
  box-shadow: 0 2px 4px rgba(27, 19, 60, 0.16), 0 14px 30px -12px rgba(27, 19, 60, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

/* 浅色主按钮：首屏视频 / 深底区块上用（沿用参考稿的白底胶囊） */
.btn--light {
  background: linear-gradient(180deg, #ffffff 0%, #f6f5fa 100%);
  color: var(--ink);
  box-shadow: var(--shadow-btn), inset 0 1px 0 #fff;
}
.btn--light:hover {
  box-shadow: 0 2px 4px rgba(27, 19, 60, 0.14), 0 12px 26px -12px rgba(27, 19, 60, 0.4),
    inset 0 1px 0 #fff;
}

.btn--ghost {
  border: 1px solid var(--line-2);
  background: rgba(255, 255, 255, 0.62);
  -webkit-backdrop-filter: var(--glass);
  backdrop-filter: var(--glass);
  color: var(--ink);
  box-shadow: var(--inset-hi);
}
.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(2, 132, 199, 0.35);
  box-shadow: var(--shadow-sm), var(--inset-hi);
}

/* 按钮扫光（--sheen）：克制的浅色高光，不喧宾夺主 */
.btn--sheen { overflow: hidden; }
.btn--sheen::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, transparent 25%, rgba(255, 255, 255, 0.45) 50%, transparent 75%);
  transform: translateX(-130%);
  transition: transform 0.7s var(--ease);
  pointer-events: none;
}
.btn--sheen:hover::after { transform: translateX(130%); }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 18px 9px 15px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: var(--glass);
  backdrop-filter: var(--glass);
  box-shadow: var(--shadow-xs), var(--inset-hi);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.01em;
}
.pill__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--acc);
  box-shadow: 0 0 0 4px var(--acc-soft);
}
.pill--light {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.24);
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}
.pill--light .pill__dot { background: #fff; box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.2); }

.grid { display: grid; gap: 22px; }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* ---------- 4. 导航：悬浮玻璃胶囊 ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 50;
  padding-top: 16px;
  transition: padding 0.3s var(--ease);
}
.nav__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 10px 18px;
  border: 1px solid rgba(255, 255, 255, 0.62);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.68);
  -webkit-backdrop-filter: var(--glass);
  backdrop-filter: var(--glass);
  box-shadow: var(--shadow-sm), var(--inset-hi);
  transition: background 0.3s var(--ease), box-shadow 0.3s var(--ease), padding 0.3s var(--ease);
}
.nav.is-solid { padding-top: 10px; }
.nav.is-solid .nav__inner {
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow), var(--inset-hi);
}

.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand__mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: #fff;
  border: 1px solid var(--line);
}
.brand__mark img { width: 26px; height: 26px; display: block; }
.brand__text { display: flex; flex-direction: column; line-height: 1.14; }
.brand__cn { font-size: 16px; font-weight: 700; letter-spacing: 0.02em; }
.brand__en {
  font-family: var(--font-serif);
  font-size: 13px;
  font-style: italic;
  color: var(--faint);
  letter-spacing: 0.04em;
}

.nav__menu { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav__link {
  position: relative;
  padding: 7px 12px;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--dim);
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.nav__link:hover { color: var(--ink); background: rgba(27, 19, 60, 0.05); }
.nav__link.is-active { color: var(--ink); }
/* 仅窄屏出现的菜单内登录入口 */
.nav__link--login { display: none; }
.nav__link.is-active::after {
  content: '';
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--acc);
}

.nav__actions { display: flex; align-items: center; gap: 10px; }

.nav__toggle {
  display: none;
  width: 38px;
  height: 34px;
  padding: 8px 7px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.6);
}
.nav__toggle span { display: block; height: 2px; border-radius: 2px; background: var(--ink); }
.nav__toggle span + span { margin-top: 5px; }
.nav__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav__toggle span { transition: transform 0.25s var(--ease), opacity 0.2s var(--ease); }

/* ---------- 5. 首屏：全屏视频 + 居中大标题 ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg-2);
}
.hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  /* 轻微加饱和/对比，抵消视频压缩后的发灰感 */
  filter: saturate(1.08) contrast(1.04);
}
/* 只做「局部提亮」，不再整屏压一层灰纱：
   中心一圈柔光托住文字，顶部一点白光让玻璃导航有依托，
   底部 20% 过渡到下一屏的白色，避免出现硬边。 */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(
      56% 44% at 50% 46%,
      rgba(255, 255, 255, 0.72) 0%,
      rgba(255, 255, 255, 0.32) 46%,
      rgba(255, 255, 255, 0) 74%
    ),
    linear-gradient(180deg, rgba(255, 255, 255, 0.4) 0%, rgba(255, 255, 255, 0) 22%),
    linear-gradient(0deg, var(--bg) 0%, rgba(255, 255, 255, 0) 18%);
}
.hero__inner {
  position: relative;
  z-index: 2;
  width: 100%;
  padding-top: 96px;
  padding-bottom: 64px;
  text-align: center;
}
.hero__copy { display: flex; flex-direction: column; align-items: center; }

.hero__title {
  margin-top: 22px;
  font-family: var(--font-serif);
  font-size: clamp(38px, 6.2vw, 80px);
  font-weight: 400;
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: var(--ink);
  max-width: 17em;
  /* 用一层白雾替代整屏遮罩：文字自己在任何画面上都立得起来 */
  text-shadow: 0 2px 22px rgba(255, 255, 255, 0.75), 0 1px 2px rgba(255, 255, 255, 0.5);
}
.hero__lead {
  margin-top: 20px;
  max-width: 720px;
  font-size: clamp(14px, 1.3vw, 17px);
  line-height: 1.75;
  color: var(--dim);
  text-shadow: 0 1px 14px rgba(255, 255, 255, 0.8);
}
.hero__lead b { color: var(--ink); font-weight: 600; }

.hero__cta { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: 32px; }

.hero__facts {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 40px;
}
.hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid rgba(255, 255, 255, 0.66);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.66);
  -webkit-backdrop-filter: var(--glass);
  backdrop-filter: var(--glass);
  box-shadow: var(--shadow-xs), var(--inset-hi);
}
.hero__facts b {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 400;
  line-height: 1;
  color: var(--acc);
}
.hero__facts span { font-size: 13px; color: var(--faint); }

.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: 26px;
  z-index: 2;
  transform: translateX(-50%);
  width: 22px;
  height: 34px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  display: grid;
  place-items: start center;
  padding-top: 6px;
}
.hero__scroll span {
  width: 3px;
  height: 7px;
  border-radius: 2px;
  background: var(--acc);
  animation: scrollDot 1.6s var(--ease) infinite;
}
@keyframes scrollDot {
  0% { opacity: 0; transform: translateY(0); }
  35% { opacity: 1; }
  100% { opacity: 0; transform: translateY(12px); }
}

/* ---------- 6. 章节 ---------- */
.sec { position: relative; padding: 96px 0; background: var(--bg); }
.sec--alt { background: var(--bg-2); }
/* 交替区块里加两束极淡的品牌色光晕：大留白不至于空得像白纸 */
.sec--alt::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(58% 48% at 6% 0%, rgba(14, 165, 233, 0.07) 0%, rgba(14, 165, 233, 0) 62%),
    radial-gradient(50% 44% at 96% 100%, rgba(249, 115, 22, 0.06) 0%, rgba(249, 115, 22, 0) 62%);
}
/* 区块内容压在光晕之上 */
.sec--alt > .wrap { position: relative; z-index: 1; }

.sec__head { position: relative; text-align: center; margin-bottom: 56px; }
.sec__no {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  box-shadow: var(--shadow-xs);
  font-family: var(--font);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--brand);
  margin-bottom: 16px;
}
.sec__no::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--grad-brand);
}
.sec__title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.6vw, 46px);
  font-weight: 400;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.sec__desc {
  margin: 18px auto 0;
  max-width: 720px;
  font-size: 15.5px;
  color: var(--dim);
}
.sec__desc b { color: var(--ink); font-weight: 600; }

/* ---------- 7. 卡片 ---------- */
.card {
  position: relative;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, #ffffff 0%, #fdfcff 100%);
  box-shadow: var(--shadow-xs), var(--inset-hi);
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease), border-color 0.28s var(--ease);
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
  border-color: rgba(2, 132, 199, 0.24);
}
.card__ico {
  position: relative;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 20px;
  border: 1px solid rgba(2, 132, 199, 0.16);
  border-radius: 14px;
  background: linear-gradient(145deg, rgba(56, 189, 248, 0.18) 0%, rgba(14, 165, 233, 0.08) 100%);
  color: var(--brand);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}
/* 图标字形来自 HTML 上的 data-ico（环 / 联 / 价 / 权）——
   这条 ::before 之前漏掉，导致 8 处图标全部空白 */
.card__ico::before {
  content: attr(data-ico);
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
}
.card__title { font-size: 19px; font-weight: 600; letter-spacing: -0.01em; }
.card__desc { margin-top: 10px; font-size: 14.5px; color: var(--dim); }
.card__desc b { color: var(--ink); font-weight: 600; }

.card--mod { padding-top: 26px; }
.card--mod::before {
  content: '';
  position: absolute;
  top: 0;
  left: 28px;
  width: 42px;
  height: 2px;
  border-radius: 0 0 2px 2px;
  background: var(--grad-brand);
}
.card__idx {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: 0.18em;
  color: var(--brand);
}
.card__title em {
  display: block;
  margin-top: 5px;
  font-style: normal;
  font-size: 13px;
  font-weight: 500;
  color: var(--faint);
}

.callout {
  display: flex;
  gap: 16px;
  margin-top: 28px;
  padding: 22px 26px;
  border: 1px solid rgba(249, 115, 22, 0.2);
  border-left: 3px solid var(--acc);
  border-radius: var(--r-lg);
  background: linear-gradient(100deg, rgba(249, 115, 22, 0.07) 0%, rgba(249, 115, 22, 0.02) 60%, rgba(255, 255, 255, 0) 100%);
  box-shadow: var(--shadow-xs);
}
.callout__ico {
  flex: none;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 11px;
  background: linear-gradient(145deg, var(--acc-2) 0%, var(--acc) 100%);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  box-shadow: 0 6px 14px -6px rgba(249, 115, 22, 0.7), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}
.callout__text { font-size: 15px; color: var(--dim); }
.callout__text b { color: var(--ink); }
.callout__text code {
  padding: 2px 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--brand);
  font-weight: 600;
}

.chips { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 30px; }
.chips__label { font-size: 13px; color: var(--faint); margin-right: 2px; }
.chip {
  padding: 7px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  box-shadow: var(--shadow-xs);
  font-size: 13.5px;
  color: var(--dim);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.chip:hover {
  color: var(--brand);
  border-color: rgba(2, 132, 199, 0.3);
  box-shadow: var(--shadow-sm);
}

/* ---------- 8. 业务闭环 ---------- */
.flow { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); gap: 24px; }
.flow__nodes { display: flex; flex-direction: column; gap: 10px; }
.fnode {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  gap: 2px 14px;
  padding: 16px 20px;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: #fff;
  box-shadow: var(--shadow-xs);
  cursor: pointer;
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease),
    background 0.22s var(--ease);
}
.fnode::before {
  content: '';
  position: absolute;
  left: -1px;
  top: 50%;
  width: 3px;
  height: 0;
  border-radius: 0 3px 3px 0;
  background: var(--grad-brand);
  transform: translateY(-50%);
  transition: height 0.25s var(--ease);
}
.fnode:hover {
  transform: translateX(3px);
  border-color: rgba(2, 132, 199, 0.26);
  box-shadow: var(--shadow-sm);
}
.fnode b { font-size: 15.5px; font-weight: 600; }
.fnode i { grid-column: 2; font-style: normal; font-size: 13px; color: var(--faint); }
.fnode__no {
  grid-row: 1 / span 2;
  align-self: center;
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--brand);
  letter-spacing: 0.1em;
}
.fnode.is-on {
  border-color: rgba(2, 132, 199, 0.34);
  background: linear-gradient(100deg, rgba(14, 165, 233, 0.07) 0%, #fff 55%);
  box-shadow: var(--shadow-sm), var(--inset-hi);
}
.fnode.is-on::before { height: 62%; }
.fnode.is-on .fnode__no { color: var(--brand); }

.flow__panel { min-width: 0; }
.fpanel { display: none; }
.fpanel.is-on {
  display: block;
  height: 100%;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, #ffffff 0%, #fdfcff 100%);
  box-shadow: var(--shadow), var(--inset-hi);
}
.fpanel h4 {
  position: relative;
  padding-left: 14px;
  font-size: 21px;
  font-weight: 600;
  font-family: var(--font-serif);
}
.fpanel h4::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 3px;
  border-radius: 3px;
  background: var(--grad-brand);
}
.fpanel p { margin-top: 14px; font-size: 15px; color: var(--dim); }
.fpanel__list { margin-top: 22px; display: grid; gap: 10px; }
.fpanel__list li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  color: var(--dim);
}
.fpanel__list li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 10px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--grad-brand);
}

/* ---------- 9. 智能亮点 ---------- */
.ai { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.ai__chat {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  overflow: hidden;
  box-shadow: var(--shadow), var(--inset-hi);
}
.ai__chat-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 15px 20px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #fbfaff 0%, #f6f5fb 100%);
}
.ai__chat-bar span { width: 9px; height: 9px; border-radius: 50%; background: rgba(27, 19, 60, 0.14); }
.ai__chat-bar span:first-child { background: rgba(249, 115, 22, 0.55); }
.ai__chat-bar b {
  margin-left: 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.ai__chat-body {
  padding: 24px;
  display: grid;
  gap: 14px;
  background: radial-gradient(120% 80% at 12% 0%, rgba(14, 165, 233, 0.05) 0%, rgba(255, 255, 255, 0) 60%);
}
.bubble {
  max-width: 86%;
  padding: 12px 16px;
  border-radius: 15px;
  font-size: 14px;
  line-height: 1.62;
}
.bubble--me {
  justify-self: end;
  background: linear-gradient(180deg, #2a2050 0%, var(--ink) 100%);
  color: #fff;
  border-bottom-right-radius: 5px;
  box-shadow: 0 6px 16px -10px rgba(27, 19, 60, 0.8), inset 0 1px 0 rgba(255, 255, 255, 0.14);
}
.bubble--sys {
  justify-self: start;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--dim);
  border-bottom-left-radius: 5px;
  box-shadow: var(--shadow-xs);
}
.bubble__typing { display: inline-flex; gap: 4px; margin-right: 6px; vertical-align: middle; }
.bubble__typing i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--brand-2);
  animation: blink 1.2s infinite;
}
.bubble__typing i:nth-child(2) { animation-delay: 0.2s; }
.bubble__typing i:nth-child(3) { animation-delay: 0.4s; }
@keyframes blink { 0%, 60%, 100% { opacity: 0.25; } 30% { opacity: 1; } }
.ai__chat-foot {
  padding: 15px 20px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, #fbfaff 0%, #f6f5fb 100%);
  font-size: 13px;
  color: var(--faint);
}

.ai__list { display: grid; gap: 14px; }
.mini {
  display: flex;
  gap: 16px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, #ffffff 0%, #fdfcff 100%);
  box-shadow: var(--shadow-xs), var(--inset-hi);
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease), border-color 0.28s var(--ease);
}
.mini:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(2, 132, 199, 0.24);
}
.mini__ico {
  flex: none;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(2, 132, 199, 0.16);
  border-radius: 13px;
  background: linear-gradient(145deg, rgba(56, 189, 248, 0.18) 0%, rgba(14, 165, 233, 0.08) 100%);
  color: var(--brand);
  font-size: 16px;
  font-weight: 700;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}
.mini h4 { font-size: 16.5px; font-weight: 600; }
.mini p { margin-top: 6px; font-size: 14px; color: var(--dim); }

/* ---------- 10. 产品界面（内部 uiapp 由 app-shot.css 负责） ---------- */
.show { display: grid; gap: 20px; }
.show__tabs { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.show__tab {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: #fff;
  box-shadow: var(--shadow-xs);
  text-align: left;
  cursor: pointer;
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease),
    background 0.22s var(--ease);
}
/* 选中 Tab 左侧一条渐变指示条（与闭环节点同一种视觉语言） */
.show__tab::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 0;
  border-radius: 0 3px 3px 0;
  background: var(--grad-brand);
  transform: translateY(-50%);
  transition: height 0.25s var(--ease);
}
.show__tab.is-on::before { height: 58%; }
.show__tab:hover {
  transform: translateY(-3px);
  border-color: rgba(2, 132, 199, 0.26);
  box-shadow: var(--shadow-sm);
}
.show__tab b { display: block; font-size: 15px; font-weight: 600; }
.show__tab i { font-style: normal; font-size: 12.5px; color: var(--faint); }
.show__tab__no {
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--acc);
  letter-spacing: 0.1em;
}
.show__tab.is-on {
  border-color: rgba(249, 115, 22, 0.45);
  background: linear-gradient(180deg, #fff, rgba(249, 115, 22, 0.06));
  box-shadow: var(--shadow);
}

.show__stage {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: linear-gradient(180deg, #ffffff 0%, #faf9fe 100%);
  box-shadow: var(--shadow-lg), var(--inset-hi);
}
.show__pane { display: none; }
.show__pane.is-on { display: block; }

/* 覆盖 app-shot.css 里为深色场景写的白描边与重阴影 */
.show__stage .uiapp {
  border: 1px solid var(--line);
  box-shadow: 0 22px 50px -28px rgba(27, 19, 60, 0.35);
}


/* ---------- 10.5 完整导航结构 ---------- */
.navmap { margin-top: 52px; }
.navmap__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}
.navmap__lead { display: grid; gap: 7px; }
.navmap__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--brand);
}
.navmap__eyebrow::before { content: ''; width: 18px; height: 1px; background: var(--brand); }
.navmap__title {
  font-family: var(--font-serif);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 400;
  line-height: 1.2;
}
.navmap__desc { max-width: 640px; font-size: 14px; line-height: 1.75; color: var(--dim); }
.navmap__desc b { color: var(--ink); font-weight: 600; }

.navmap__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}
.navmap__cell {
  position: relative;
  padding: 16px 16px 15px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow-xs);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}
/* 与会员方案卡同一条顶部渐变短线，横向并排时连成有节奏的色带 */
.navmap__cell::before {
  content: '';
  position: absolute;
  top: 0;
  left: 16px;
  right: 16px;
  height: 2px;
  border-radius: 0 0 2px 2px;
  background: var(--grad-brand);
  opacity: 0.32;
  transition: opacity 0.25s var(--ease);
}
.navmap__cell:hover {
  transform: translateY(-3px);
  border-color: rgba(2, 132, 199, 0.22);
  box-shadow: var(--shadow-sm);
}
.navmap__cell:hover::before { opacity: 1; }
.navmap__hd { display: flex; align-items: center; gap: 9px; }
.navmap__no {
  flex: none;
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 11px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.navmap__hd h4 {
  min-width: 0;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.navmap__hd em { margin-left: auto; flex: none; font-style: normal; font-size: 11.5px; color: var(--faint); }
.navmap__list { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.navmap__list li {
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-2);
  font-size: 12.5px;
  color: var(--dim);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.navmap__cell:hover .navmap__list li {
  border-color: rgba(2, 132, 199, 0.18);
  background: var(--brand-soft);
  color: var(--brand-2);
}
/* 上方四张截图对应的页面：实底标出来，导航图与截图能对上号 */
.navmap__list li.is-shot {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  font-weight: 600;
}
.navmap__cell:hover .navmap__list li.is-shot {
  background: var(--brand-2);
  border-color: var(--brand-2);
  color: #fff;
}
.navmap__list li.is-shot::after {
  content: '有截图';
  margin-left: 5px;
  font-size: 10.5px;
  font-weight: 500;
  opacity: 0.75;
}
.navmap__foot { margin-top: 18px; font-size: 13px; color: var(--faint); }

/* ---------- 11. 会员方案 ---------- */
.plans {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  align-items: stretch;
  padding-top: 12px;
}
.plan {
  position: relative;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(180deg, #ffffff 0%, #fcfbff 100%);
  box-shadow: var(--shadow-xs);
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease), border-color 0.28s var(--ease);
}
/* 卡顶一条极窄的品牌色渐变短线：四张卡并排时形成一条有节奏的彩色带 */
.plan::before {
  content: '';
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: var(--grad-brand);
  opacity: 0.5;
  transition: opacity 0.28s var(--ease);
}
.plan:hover {
  transform: translateY(-5px);
  border-color: rgba(2, 132, 199, 0.2);
  box-shadow: var(--shadow);
}
.plan:hover::before { opacity: 1; }
/* flex:1 让按钮与脚注始终贴底，四张卡高度不同也不会参差 */
.plan__body { flex: 1; padding: 26px 24px 4px; }
.plan__top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.plan__ico {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(2, 132, 199, 0.16);
  border-radius: 13px;
  background: linear-gradient(145deg, rgba(56, 189, 248, 0.18) 0%, rgba(14, 165, 233, 0.08) 100%);
  color: var(--brand);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}
.plan__ico svg { width: 20px; height: 20px; }
.plan__badge {
  padding: 4px 11px;
  border-radius: 999px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  font-size: 12px;
  font-weight: 600;
  color: var(--dim);
}
.plan__name { margin-top: 18px; font-size: 19px; font-weight: 600; }
.plan__price { display: flex; align-items: baseline; gap: 5px; margin-top: 6px; }
/* 价格用衬线数字：与章节标题同一套字形，比粗黑无衬线更有质感 */
.plan__price b {
  font-family: var(--font-serif);
  font-size: 40px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.01em;
}
.plan__price span { font-size: 13.5px; color: var(--faint); }
.plan__desc { margin-top: 8px; font-size: 13.5px; color: var(--faint); }

.plan__list { margin-top: 22px; display: grid; }
.plan__feat {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(27, 19, 60, 0.09);
  font-size: 14px;
  color: var(--dim);
}
.plan__feat:last-child { border-bottom: 0; }
.plan__feat.is-off { color: rgba(27, 19, 60, 0.32); }
.plan__mark { flex: none; display: grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; }
.plan__mark svg { width: 13px; height: 13px; }
.plan__mark--yes { background: var(--brand-soft); color: var(--brand); }
.plan__mark--no { background: rgba(27, 19, 60, 0.05); color: rgba(27, 19, 60, 0.3); }

.plan__btn {
  margin: 20px 24px 0;
  padding: 13px 18px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: #fff;
  box-shadow: var(--shadow-xs);
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.plan__btn:hover {
  transform: translateY(-1px);
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  box-shadow: 0 10px 22px -10px rgba(2, 132, 199, 0.85);
}
.plan__foot {
  padding: 14px 24px 22px;
  font-size: 12.5px;
  color: var(--faint);
  text-align: center;
}

/* 推荐方案：深靛渐变 + 蓝橙双光晕 + 顶部居中丝带（对齐参考稿的 Popular 卡） */
.plan--rec {
  border-color: transparent;
  color: #fff;
  transform: translateY(-6px);
  background:
    radial-gradient(130% 80% at 10% -12%, rgba(14, 165, 233, 0.42) 0%, rgba(14, 165, 233, 0) 58%),
    radial-gradient(120% 70% at 100% 108%, rgba(249, 115, 22, 0.3) 0%, rgba(249, 115, 22, 0) 58%),
    linear-gradient(168deg, #2b1c58 0%, var(--ink) 58%, #140d2b 100%);
  box-shadow: 0 2px 6px rgba(27, 19, 60, 0.16), 0 40px 80px -34px rgba(27, 19, 60, 0.62);
}
.plan--rec:hover { transform: translateY(-11px); }
.plan--rec::before { background: linear-gradient(90deg, #38bdf8, #f97316); opacity: 1; }
.plan--rec .plan__badge { background: rgba(255, 255, 255, 0.12); border-color: rgba(255, 255, 255, 0.2); color: #fff; }
.plan--rec .plan__ico {
  border-color: rgba(249, 115, 22, 0.35);
  background: linear-gradient(145deg, rgba(249, 115, 22, 0.3) 0%, rgba(249, 115, 22, 0.1) 100%);
  color: #ffd9ab;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}
.plan--rec .plan__name { color: #fff; }
.plan--rec .plan__price b { color: #fff; }
.plan--rec .plan__desc,
.plan--rec .plan__price span { color: rgba(255, 255, 255, 0.6); }
.plan--rec .plan__feat { color: rgba(255, 255, 255, 0.8); border-bottom-color: rgba(255, 255, 255, 0.1); }
.plan--rec .plan__feat.is-off { color: rgba(255, 255, 255, 0.32); }
.plan--rec .plan__mark--yes { background: rgba(56, 189, 248, 0.22); color: #7dd3fc; }
.plan--rec .plan__mark--no { background: rgba(255, 255, 255, 0.08); color: rgba(255, 255, 255, 0.3); }
.plan--rec .plan__btn {
  background: #fff;
  border-color: #fff;
  color: var(--ink);
  box-shadow: 0 12px 26px -12px rgba(0, 0, 0, 0.55);
}
.plan--rec .plan__btn:hover { background: var(--acc); border-color: var(--acc); color: #fff; }
.plan--rec .plan__foot { color: rgba(255, 255, 255, 0.5); }
/* 推荐丝带：顶部居中压边，比右上角小角标更有仪式感 */
.plan__ribbon {
  position: absolute;
  top: -12px;
  left: 50%;
  z-index: 3;
  padding: 5px 15px;
  border-radius: 999px;
  background: linear-gradient(135deg, #fb923c 0%, #f97316 100%);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  transform: translateX(-50%);
  box-shadow: 0 10px 20px -10px rgba(249, 115, 22, 0.9), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.plan-note { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 24px; margin-top: 30px; }
.plan-note__item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13.5px;
  color: var(--faint);
}
.plan-note__item svg { width: 15px; height: 15px; }
.plan-note__item--yes svg { color: var(--brand); }
.plan-note__item--no svg { color: rgba(27, 19, 60, 0.3); }
.plan-note__item--info svg { color: var(--brand-2); }

/* ---------- 12. 底部行动区 + 页脚 ---------- */
.cta {
  position: relative;
  padding: 104px 0;
  color: #fff;
  text-align: center;
  overflow: hidden;
  /* 深靛底 + 两束品牌蓝 / 橙的光晕，避免大面积纯色发闷 */
  background:
    radial-gradient(90% 130% at 10% 0%, rgba(14, 165, 233, 0.32) 0%, rgba(14, 165, 233, 0) 55%),
    radial-gradient(80% 120% at 96% 108%, rgba(249, 115, 22, 0.26) 0%, rgba(249, 115, 22, 0) 55%),
    linear-gradient(160deg, #251848 0%, var(--ink) 55%, #130c29 100%);
}
.cta__inner { display: flex; flex-direction: column; align-items: center; }
.cta__title {
  margin-top: 22px;
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.6vw, 46px);
  font-weight: 400;
  line-height: 1.18;
}
.cta__desc { margin-top: 16px; max-width: 640px; font-size: 15.5px; color: rgba(255, 255, 255, 0.7); }
.cta__btns { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: 32px; }
.cta .btn--ghost {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.24);
  color: #fff;
}
.cta .btn--ghost:hover { background: rgba(255, 255, 255, 0.16); border-color: rgba(255, 255, 255, 0.4); }

.foot {
  position: relative;
  padding: 0 0 28px;
  background: linear-gradient(180deg, #fbfaff 0%, #f4f3fa 100%);
  overflow: hidden;
}
/* 用一条渐变细线代替普通 border-top：与上一屏的接缝更精致 */
.foot::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(56, 189, 248, 0.55) 24%,
    rgba(249, 115, 22, 0.5) 76%,
    transparent 100%
  );
}
/* 右下角一块巨大的衬线斜体水印：给扁平页脚一点纵深与品牌感 */
.foot::after {
  content: 'FreshLink';
  position: absolute;
  right: -1.5%;
  bottom: -8%;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(88px, 15vw, 210px);
  line-height: 1;
  color: rgba(27, 19, 60, 0.04);
  pointer-events: none;
  user-select: none;
}
.foot__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.4fr);
  gap: 48px;
  padding-top: 64px;
  padding-bottom: 44px;
}
.foot__brand { max-width: 360px; }
.foot__slogan { margin-top: 16px; font-size: 14.5px; line-height: 1.7; color: var(--dim); }
.foot__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 22px;
  padding: 11px 18px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: #fff;
  box-shadow: var(--shadow-xs);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  transition: transform 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}
.foot__cta svg { width: 16px; height: 16px; color: var(--acc); }
.foot__cta:hover {
  transform: translateY(-1px);
  color: var(--brand);
  border-color: rgba(2, 132, 199, 0.3);
  box-shadow: var(--shadow-sm);
}

.foot__cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; }
.foot__col { display: grid; gap: 12px; align-content: start; }
.foot__col h5 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 4px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink);
}
/* 列标题右侧一条渐隐细线，替代干巴巴的三行字 */
.foot__col h5::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
}
.foot__col a {
  position: relative;
  width: fit-content;
  font-size: 14px;
  color: var(--faint);
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}
.foot__col a::before {
  content: '';
  position: absolute;
  left: -12px;
  top: 50%;
  width: 6px;
  height: 1px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease);
}
.foot__col a:hover { color: var(--brand); transform: translateX(9px); }
.foot__col a:hover::before { transform: scaleX(1); }

.foot__bottom {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 24px;
  align-items: center;
  justify-content: space-between;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--faint);
}
.foot__legal { display: flex; flex-wrap: wrap; gap: 6px 20px; align-items: center; }
.foot__hint { color: rgba(27, 19, 60, 0.4); }
.foot__top {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  box-shadow: var(--shadow-xs);
  font-size: 13px;
  color: var(--dim);
  transition: transform 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}
.foot__top svg { width: 14px; height: 14px; }
.foot__top:hover {
  transform: translateY(-2px);
  color: var(--brand);
  border-color: rgba(2, 132, 199, 0.3);
  box-shadow: var(--shadow-sm);
}

/* ---------- 13. 技术咨询弹窗 ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: grid;
  place-items: center;
  padding: 24px;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.25s var(--ease), visibility 0.25s var(--ease);
}
.modal.is-open { visibility: visible; opacity: 1; }
.modal__mask { position: absolute; inset: 0; background: rgba(27, 19, 60, 0.42); -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px); }
.modal__panel {
  position: relative;
  width: min(420px, 100%);
  padding: 30px;
  border-radius: var(--r-xl);
  background: #fff;
  box-shadow: var(--shadow-lg);
  text-align: center;
}
.modal__close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  color: var(--faint);
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.modal__close:hover { background: var(--bg-2); color: var(--ink); }
.modal__close svg { width: 16px; height: 16px; }
.modal__tag {
  display: inline-block;
  padding: 5px 13px;
  border-radius: 999px;
  background: var(--acc-soft);
  color: var(--acc);
  font-size: 12.5px;
  font-weight: 600;
}
.modal__title { margin-top: 14px; font-size: 21px; font-weight: 600; }
.modal__desc { margin-top: 10px; font-size: 14px; color: var(--dim); }
.modal__qr {
  width: 200px;
  margin: 20px auto 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
}
/* 必须显式 height:auto —— HTML 上写了 width/height 属性（801×801），
   否则宽度被拉到 100%、高度仍按 801px 算，二维码会被纵向拉成长条 */
.modal__qr img { display: block; width: 100%; height: auto; border-radius: 10px; }
.modal__hint { margin-top: 14px; font-size: 13px; color: var(--faint); }

/* ---------- 14. 动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
[data-reveal].is-in { opacity: 1; transform: none; }
[data-reveal-delay='1'] { transition-delay: 0.06s; }
[data-reveal-delay='2'] { transition-delay: 0.12s; }
[data-reveal-delay='3'] { transition-delay: 0.18s; }
[data-reveal-delay='4'] { transition-delay: 0.24s; }
[data-reveal-delay='5'] { transition-delay: 0.3s; }

/* 章节标题逐字上浮（JS 会把 .sec__title 拆成 span.ch） */
.sec__title .ch {
  display: inline-block;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.sec__head.is-in .sec__title .ch { opacity: 1; transform: none; }

/* 顶部阅读进度条 */
.prog {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 60;
  height: 3px;
  width: 0;
  background: var(--grad);
  border-radius: 0 2px 2px 0;
}

/* 标题灯（JS 注入 .lamp）：浅色下压成一条柔和的橙色光带 */
.lamp {
  position: relative;
  height: 22px;
  margin: 0 auto 10px;
  width: 120px;
}
.lamp__stage { position: absolute; inset: 0; }
.lamp__beam {
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 120px;
  height: 60px;
  transform: translateX(-50%);
  background: radial-gradient(50% 100% at 50% 0%, rgba(249, 115, 22, 0.22), transparent 70%);
  opacity: 0;
  transition: opacity 0.8s var(--ease);
}
.lamp__halo {
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 60px;
  height: 10px;
  transform: translateX(-50%);
  border-radius: 50%;
  background: rgba(14, 165, 233, 0.38);
  filter: blur(7px);
  opacity: 0;
  transition: opacity 0.8s var(--ease);
}
.lamp__spot { display: none; }
.lamp__bar {
  position: absolute;
  left: 50%;
  bottom: 6px;
  width: 74px;
  height: 2px;
  transform: translateX(-50%);
  border-radius: 2px;
  background: var(--grad);
  opacity: 0;
  transition: opacity 0.8s var(--ease);
}
.sec__head.is-in .lamp__beam,
.sec__head.is-in .lamp__halo,
.sec__head.is-in .lamp__bar { opacity: 1; }

/* 标题星星（JS 注入 .spk）：橙色小四角星，弱化存在感 */
.sparkles { position: absolute; inset: 0; pointer-events: none; }
.spk {
  position: absolute;
  width: 10px;
  height: 10px;
  color: var(--brand-2);
  opacity: 0.7;
  animation: spkBlink 0.8s ease-in-out infinite;
}
.spk svg { width: 100%; height: 100%; fill: currentColor; }
/* 标题滚出视口时停帧（is-paused 由 JS 的 IntersectionObserver 切换） */
.sparkles.is-paused .spk { animation-play-state: paused; }
/* 数字计数器用等宽数字：数字滚动时不会左右抖 */
.count { font-variant-numeric: tabular-nums; }
@keyframes spkBlink {
  0%, 100% { opacity: 0; transform: scale(0.4) rotate(75deg); }
  50% { opacity: 0.75; transform: scale(1) rotate(120deg); }
}

.magnet { will-change: transform; }

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1080px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .plans { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  /* 两列排布时推荐卡不再上浮，否则第一行会被挤出容器 */
  .plan--rec, .plan--rec:hover { transform: none; }
  .navmap__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .flow, .ai { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 860px) {
  .nav__toggle { display: block; }
  .nav__menu {
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + 8px);
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    margin: 0 12px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    background: rgba(255, 255, 255, 0.94);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow);
  }
  .nav__menu.is-open { display: flex; }
  .nav__link--login { display: block; color: var(--acc); font-weight: 600; }
  .nav__actions .btn--sm { display: none; }
  .sec { padding: 72px 0; }
  .hero__inner { padding-top: 88px; }
}

@media (max-width: 620px) {
  .grid--4, .grid--3, .plans { grid-template-columns: minmax(0, 1fr); }
  .navmap__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .navmap__cell:hover { transform: none; }
  .hero { min-height: 92vh; }
  .hero__facts li { padding: 10px 16px; }
  .fpanel.is-on, .card { padding: 24px 20px; }
  .foot__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
  .foot__col h5::after { display: none; }
  .foot__bottom { justify-content: flex-start; }
}

/* 动效降级：只关「循环动画 / 大幅位移」，保留淡入与交互反馈。
   把 transition 一并压成 0.01ms 会让系统开启「减少动画效果」的用户看到整站静止。 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .grad--flow,
  .lamp__beam,
  .lamp__halo,
  .lamp__bar,
  .spk,
  .prog,
  .bubble__typing i,
  .btn--sheen::after,
  .hero__scroll span { animation: none !important; }
  .grad--flow { background-position: 0 center; }
  .spk { opacity: 0.75; transform: none; }
  [data-reveal] { opacity: 1; transform: none; }
  [data-parallax] { transform: none !important; }
  .card:hover, .mini:hover, .plan:hover, .plan--rec:hover, .fnode:hover, .show__tab:hover,
  .btn:hover, .chip:hover, .foot__col a:hover, .foot__top:hover { transform: none; }
}