/* ==========================================================================
   搭个朋友 go-buddy.com — 品牌官网 V1.0 视觉系统
   运营主体：青岛新一程文旅科技有限公司
   定位：面向 50+ 人群的生活方式品牌
   设计原则：明亮、自然、克制、高级；品牌蓝为主，活力橙点缀，大量留白
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计令牌 Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* 品牌色 —— 源自 Logo */
  --blue:        #0050a8;   /* 品牌主色：宝蓝 */
  --blue-deep:   #01356f;   /* 深蓝：Footer / 深色区 */
  --blue-ink:    #16283c;   /* 文字墨蓝 */
  --blue-bright: #1e7fb8;   /* 亮蓝：图标 / 强调 */
  --blue-tint:   #eef5fb;   /* 蓝色浅底 */
  --orange:      #f06000;   /* 活力橙：CTA / 点缀 */
  --orange-dark: #d45400;
  --orange-tint: #fff2e8;
  --amber:       #fca800;   /* 琥珀 */
  --green:       #7cb342;   /* 草绿 */

  /* 中性色 */
  --ink:      #16283c;   /* 主文字 */
  --ink-2:    #42586f;   /* 次级文字 */
  --ink-3:    #6d7f92;   /* 辅助文字 */
  --ink-4:    #9aa8b6;   /* 更弱 */
  --line:     #e6eaee;   /* 分割线 */
  --line-2:   #eef1f4;   /* 更浅分割线 */
  --bg:       #ffffff;
  --bg-warm:  #faf9f6;   /* 暖白背景 */
  --bg-tint:  #f3f7fa;   /* 蓝调浅底 */
  --bg-sand:  #f6f3ee;   /* 沙色浅底 */

  /* 圆角 */
  --r-xs: 8px;
  --r-btn: 12px;
  --r-card: 22px;
  --r-img: 20px;
  --r-lg: 28px;
  --r-pill: 999px;

  /* 阴影 —— 极轻 */
  --sh-xs: 0 1px 2px rgba(16, 40, 70, .04);
  --sh-sm: 0 2px 10px rgba(16, 40, 70, .05);
  --sh-md: 0 10px 34px rgba(16, 40, 70, .07);
  --sh-lg: 0 22px 60px rgba(16, 40, 70, .10);

  /* 排版 */
  --font: "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB",
          "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei",
          -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;

  /* 布局 —— 跟随视口宽度阶梯递增，避免大屏两侧空白 */
  --container: 1320px;
  --header-h: 76px;
  --gutter: 24px;

  /* 动效 */
  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: .55s;
}

/* --------------------------------------------------------------------------
   2. 重置 Reset
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-2);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; border: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }
figure { margin: 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: 0; }

/* 无障碍：跳过导航 */
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 999;
  background: var(--blue); color: #fff; padding: 12px 20px;
  border-radius: 0 0 var(--r-btn) 0;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 3px solid rgba(30, 127, 184, .5);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection { background: rgba(0, 80, 168, .14); color: var(--blue-deep); }

/* --------------------------------------------------------------------------
   3. 布局工具 Layout
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(72px, 9vw, 132px); }
.section--tight { padding-block: clamp(56px, 6vw, 92px); }
.bg-warm { background: var(--bg-warm); }
.bg-tint { background: var(--bg-tint); }
.bg-sand { background: var(--bg-sand); }

.grid { display: grid; gap: clamp(24px, 3vw, 44px); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* 兴趣 / 生活 2×2 图片墙（生活方式页） */
.grid-photos {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(10px, 1.2vw, 16px);
}
.grid-photos .media { border-radius: 16px; }

/* 大字短句条 */
.line-item {
  padding-top: 26px;
  border-top: 2px solid var(--line);
  font-size: clamp(19px, 1.95vw, 24px);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.62;
  letter-spacing: -.005em;
}
.line-item:nth-child(1) { border-top-color: rgba(0, 80, 168, .55); }
.line-item:nth-child(2) { border-top-color: rgba(240, 96, 0, .55); }
.line-item:nth-child(3) { border-top-color: rgba(124, 179, 66, .7); }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(36px, 5vw, 80px);
  align-items: center;
}
.split--wide-left  { grid-template-columns: 1.05fr .95fr; }
.split--wide-right { grid-template-columns: .9fr 1.1fr; }

/* --------------------------------------------------------------------------
   4. 排版 Typography
   -------------------------------------------------------------------------- */
.h1 {
  font-size: clamp(40px, 5.6vw, 72px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -.015em;
  color: var(--ink);
}
.h2 {
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.32;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}
.h3 {
  font-size: clamp(20px, 2vw, 24px);
  line-height: 1.5;
  font-weight: 700;
  color: var(--ink);
}
.h4 {
  font-size: 18px;
  line-height: 1.6;
  font-weight: 700;
  color: var(--ink);
}
.lead {
  font-size: clamp(17px, 1.5vw, 20px);
  line-height: 1.9;
  color: var(--ink-2);
}
.body { color: var(--ink-2); }
.muted { color: var(--ink-3); }
.small { font-size: 14px; line-height: 1.7; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--blue-bright);
  margin-bottom: 20px;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 2px;
  background: var(--orange);
  border-radius: 2px;
}
.eyebrow--plain { color: var(--ink-3); }
.eyebrow--plain::before { display: none; }

.accent { color: var(--orange); }
.blue { color: var(--blue); }

.text-center { text-align: center; }
.measure { max-width: 62ch; }
.measure-sm { max-width: 48ch; }
.mx-auto { margin-inline: auto; }

/* 章节头 */
.section-head { max-width: 720px; margin-bottom: clamp(40px, 5vw, 64px); }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head .h2 + p { margin-top: 20px; color: var(--ink-3); font-size: 17px; }

/* --------------------------------------------------------------------------
   5. 按钮 Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 30px;
  border-radius: var(--r-btn);
  font-size: 16px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .01em;
  transition: transform .25s var(--ease), background-color .25s var(--ease),
              box-shadow .25s var(--ease), color .25s var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn svg { width: 17px; height: 17px; flex: 0 0 auto; }

.btn--primary {
  background: var(--orange);
  color: #fff;
  box-shadow: 0 6px 18px rgba(240, 96, 0, .22);
}
.btn--primary:hover { background: var(--orange-dark); box-shadow: 0 10px 26px rgba(240, 96, 0, .28); }

.btn--blue {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 6px 18px rgba(0, 80, 168, .20);
}
.btn--blue:hover { background: var(--blue-deep); box-shadow: 0 10px 26px rgba(0, 80, 168, .26); }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  box-shadow: inset 0 0 0 1.5px var(--line);
}
.btn--ghost:hover { box-shadow: inset 0 0 0 1.5px var(--blue); color: var(--blue); }

.btn--light {
  background: #fff;
  color: var(--blue);
  box-shadow: var(--sh-sm);
}
.btn--light:hover { color: var(--orange); box-shadow: var(--sh-md); }

.btn--text {
  padding: 8px 0;
  color: var(--blue);
  font-weight: 700;
}
.btn--text:hover { color: var(--orange); transform: none; }
.btn--text::after {
  content: "→";
  transition: transform .25s var(--ease);
}
.btn--text:hover::after { transform: translateX(4px); }

.btn--sm { padding: 11px 22px; font-size: 15px; }
.btn--lg { padding: 18px 36px; font-size: 17px; }

.btn-row { display: flex; flex-wrap: wrap; gap: 16px; }

/* --------------------------------------------------------------------------
   6. Header
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: background-color .3s var(--ease), border-color .3s var(--ease),
              box-shadow .3s var(--ease);
}
.header.is-scrolled {
  background: rgba(255, 255, 255, .94);
  border-bottom-color: var(--line-2);
  box-shadow: 0 6px 24px rgba(16, 40, 70, .05);
}
.header__inner {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.header__logo { display: flex; align-items: center; flex: 0 0 auto; }
.header__logo img { height: 58px; width: auto; }
.header__logo .logo-dark { display: block; }
.header__logo .logo-light { display: none; }

.nav { display: flex; align-items: center; gap: 6px; }
.nav__link {
  position: relative;
  padding: 10px 16px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-2);
  border-radius: 10px;
  transition: color .22s var(--ease), background-color .22s var(--ease);
}
.nav__link:hover { color: var(--blue); background: var(--blue-tint); }
.nav__link.is-active { color: var(--blue); }
.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 2px;
  height: 2px; border-radius: 2px;
  background: var(--orange);
}
.header__cta { margin-left: 10px; }

/* 汉堡菜单 */
.burger {
  display: none;
  width: 46px; height: 46px;
  border-radius: 12px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  transition: background-color .22s var(--ease);
}
.burger:hover { background: var(--bg-tint); }
.burger span {
  display: block;
  width: 22px; height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform .3s var(--ease), opacity .25s var(--ease);
}
.burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端抽屉 */
.drawer {
  position: fixed;
  inset: var(--header-h) 0 auto 0;
  z-index: 99;
  background: #fff;
  border-bottom: 1px solid var(--line);
  box-shadow: 0 20px 50px rgba(16, 40, 70, .10);
  padding: 12px var(--gutter) 26px;
  transform: translateY(-12px);
  opacity: 0;
  visibility: hidden;
  transition: transform .35s var(--ease), opacity .3s var(--ease), visibility .3s;
}
.drawer.is-open { transform: translateY(0); opacity: 1; visibility: visible; }
.drawer__link {
  display: block;
  padding: 16px 8px;
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  border-bottom: 1px solid var(--line-2);
}
.drawer__link.is-active { color: var(--blue); }
.drawer__cta { margin-top: 20px; width: 100%; }

/* --------------------------------------------------------------------------
   7. Hero —— 真正的 16:9 横幅（高 = 宽 × 9/16），大屏下撑满至 760px
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(36px, 4.4vw, 68px));
  padding-bottom: clamp(48px, 5vw, 84px);
  background: linear-gradient(180deg, var(--bg-warm) 0%, #fff 78%);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -180px; right: -140px;
  width: 620px; height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(30, 127, 184, .09), transparent 68%);
  pointer-events: none;
}
.hero__grid {
  display: grid;
  grid-template-columns: .86fr 1.14fr;
  gap: clamp(36px, 4.5vw, 68px);
  align-items: center;
  position: relative;
}
.hero__title {
  font-size: clamp(42px, 5.8vw, 76px);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--ink);
}
.hero__title em {
  font-style: normal;
  color: var(--blue);
  white-space: nowrap;
  background-image: linear-gradient(transparent 68%, rgba(252, 168, 0, .55) 68%, rgba(252, 168, 0, .55) 94%, transparent 94%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
  padding: 0 .04em;
  margin: 0 -.02em;
}
.hero__sub {
  margin-top: 26px;
  font-size: clamp(17px, 1.6vw, 21px);
  line-height: 1.85;
  color: var(--ink-2);
  max-width: 30em;
}
.hero__note {
  margin-top: 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-3);
  max-width: 34em;
}
.hero__actions { margin-top: 38px; }
.hero__meta {
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 14px 32px;
}
.hero__meta span {
  font-size: 14.5px;
  color: var(--ink-3);
  display: inline-flex;
  align-items: center;
  gap: 9px;
}
.hero__meta i {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--orange);
  display: inline-block;
}
.hero__media { position: relative; display: flex; }
.hero__media > .ph,
.hero__media > .media { width: 100%; aspect-ratio: 16 / 9; height: auto; }
.hero__media > .media img { width: 100%; height: 100%; object-fit: cover; }
.hero__copy { min-width: 0; }

/* --------------------------------------------------------------------------
   8. 图片占位 Image Placeholder
   -------------------------------------------------------------------------- */
.ph {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  border-radius: var(--r-img);
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(0, 80, 168, .05), rgba(240, 96, 0, .045)),
    repeating-linear-gradient(45deg, rgba(0, 80, 168, .028) 0 12px, transparent 12px 24px),
    var(--bg-tint);
  box-shadow: inset 0 0 0 1px rgba(0, 80, 168, .10);
  isolation: isolate;
}
.ph::before {
  content: "";
  position: absolute;
  inset: 14px;
  border: 1.5px dashed rgba(0, 80, 168, .22);
  border-radius: calc(var(--r-img) - 10px);
  pointer-events: none;
}
.ph__tag {
  position: absolute;
  top: 22px; left: 22px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px;
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, .92);
  color: var(--blue);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  box-shadow: var(--sh-xs);
}
.ph__tag::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--orange);
}
.ph__body {
  position: relative;
  z-index: 2;
  margin: 0 22px 22px;
  padding: 18px 20px;
  border-radius: 14px;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, .8);
  box-shadow: var(--sh-xs);
}
.ph__label {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}
.ph__hint {
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-3);
}
.ph__ratio {
  position: absolute;
  top: 22px; right: 22px;
  z-index: 2;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--ink-3);
  background: rgba(255, 255, 255, .9);
  padding: 6px 11px;
  border-radius: var(--r-pill);
  box-shadow: var(--sh-xs);
}

/* 小尺寸占位（四宫格卡片）里的说明面板收窄，避免占满画面 */
.card__media::before { inset: 9px; border-radius: 12px; }
.card__media .ph__tag { top: 10px; left: 10px; padding: 3px 8px; font-size: 9.5px; letter-spacing: .08em; }
.card__media .ph__tag::before { width: 5px; height: 5px; }
.card__media .ph__body { margin: 0 9px 9px; padding: 9px 11px; border-radius: 10px; }
.card__media .ph__label { font-size: 12.5px; }
.card__media .ph__hint { margin-top: 2px; font-size: 10.5px; line-height: 1.5; }
/* 比例 */
.ph--16x9 { aspect-ratio: 16 / 9; }
.ph--4x3  { aspect-ratio: 4 / 3; }
.ph--3x2  { aspect-ratio: 3 / 2; }
.ph--1x1  { aspect-ratio: 1 / 1; }
.ph--3x4  { aspect-ratio: 3 / 4; }
.ph--21x9 { aspect-ratio: 21 / 9; }
.ph--5x4  { aspect-ratio: 5 / 4; }
.ph--tall { aspect-ratio: 4 / 5; }

/* 真实图片容器（后续替换占位时启用） */
.media {
  border-radius: var(--r-img);
  overflow: hidden;
  background: var(--bg-tint);
}
.media img { width: 100%; height: 100%; object-fit: cover; }

/* --------------------------------------------------------------------------
   9. 卡片 Cards
   -------------------------------------------------------------------------- */
.card {
  background: #fff;
  border-radius: var(--r-card);
  border: 1px solid var(--line-2);
  overflow: hidden;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease),
              border-color .35s var(--ease);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--sh-md);
  border-color: transparent;
}
.card__media { border-radius: 0; box-shadow: none; }
.card__body { padding: 26px 26px 30px; }
.card__num {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .12em;
  color: var(--orange);
  margin-bottom: 12px;
  display: block;
}
.card__title { font-size: 21px; font-weight: 700; color: var(--ink); margin-bottom: 12px; }
.card__text { font-size: 15.5px; line-height: 1.8; color: var(--ink-3); }
.card__link { margin-top: 18px; }

/* 内容卡片（浅底、无边框） */
.tile {
  background: #fff;
  border-radius: var(--r-card);
  padding: 34px 32px;
  border: 1px solid var(--line-2);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.tile:hover { transform: translateY(-5px); box-shadow: var(--sh-md); }
.tile__icon {
  width: 52px; height: 52px;
  border-radius: 16px;
  display: grid; place-items: center;
  background: var(--blue-tint);
  color: var(--blue);
  margin-bottom: 20px;
}
.tile__icon svg { width: 26px; height: 26px; }
.tile__icon--orange { background: var(--orange-tint); color: var(--orange); }
.tile__title { font-size: 20px; font-weight: 700; color: var(--ink); margin-bottom: 10px; }
.tile__text { font-size: 15.5px; line-height: 1.8; color: var(--ink-3); }

/* --------------------------------------------------------------------------
   10. 生活场景拼贴
   说明：不再给格子上单独的 aspect-ratio（会与固定行高打架、导致图片溢出压叠），
        改为「容器按网格比例定高 + 行等高 1fr + 图片 object-fit 填充」，
        5 张场景图 + 1 张城市图铺满 3×4 网格，最后一行是通栏观点条。
   -------------------------------------------------------------------------- */
.collage {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(4, 1fr);
  gap: clamp(14px, 1.4vw, 22px);
  /* 宽：高使 1×1 格子 ≈ 16:9 */
  aspect-ratio: 4 / 3.08;
}
.collage > .media { aspect-ratio: auto; height: 100%; }
.collage .ph,
.collage .media { border-radius: 18px; }
.collage .ph::before { inset: 10px; border-radius: 11px; }
.collage .ph__body { padding: 13px 15px; margin: 0 15px 15px; }
.collage .ph__label { font-size: 13px; }
.collage .ph__hint { font-size: 11.5px; margin-top: 4px; }
.collage .ph__tag { top: 14px; left: 14px; padding: 4px 9px; font-size: 10px; }
.collage .ph__ratio { display: none; }

/* 大图 2 列 × 2 行（≈ 16:9），其余为 1×1，观点条通栏 */
.collage__a { grid-column: span 2; grid-row: span 2; }
.collage__b { grid-column: span 1; grid-row: span 1; }
.collage__c { grid-column: span 1; grid-row: span 1; }
.collage__d { grid-column: span 1; grid-row: span 1; }
.collage__e { grid-column: span 1; grid-row: span 1; }
.collage__f { grid-column: span 1; grid-row: span 1; }
.collage__quote {
  grid-column: span 3;
  grid-row: span 1;
  display: flex;
  align-items: center;
  padding: clamp(22px, 2.2vw, 34px) clamp(26px, 2.6vw, 40px);
  border-radius: 18px;
  background: var(--blue);
  color: #fff;
}
.collage__quote p {
  font-size: clamp(18px, 1.8vw, 22px);
  font-weight: 700;
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   11. 品牌主张（深色大视觉区）—— 16:9 视觉
   -------------------------------------------------------------------------- */
.manifesto {
  position: relative;
  isolation: isolate;
  /* 用视口宽度驱动高度（≈16:9 观感），不用 aspect-ratio，避免移动端被反推宽度 */
  min-height: clamp(380px, 56vw, 720px);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  max-width: 100%;
  border-radius: 0;
}
.manifesto__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: linear-gradient(120deg, #0a2a52 0%, #01356f 42%, #0b4c86 100%);
}
.manifesto__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
}
.manifesto__bg .ph {
  height: 100%;
  border-radius: 0;
  box-shadow: none;
  background:
    linear-gradient(120deg, #0a2a52 0%, #01356f 42%, #0b4c86 100%);
}
.manifesto__bg .ph::before { display: none; }
/* 深色区里的占位标签改为融入深色背景 */
.manifesto__bg .ph__tag {
  background: rgba(255, 255, 255, .12);
  color: rgba(255, 255, 255, .82);
  border: 1px solid rgba(255, 255, 255, .18);
  box-shadow: none;
  opacity: 1 !important;
}
.manifesto__bg .ph__tag::before { background: var(--amber); }
.manifesto__scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(6, 28, 56, .48), rgba(6, 28, 56, .66));
}
.manifesto__inner {
  text-align: center;
  color: #fff;
  padding-block: clamp(72px, 9vw, 120px);
  max-width: 900px;
}
.manifesto__eyebrow {
  color: rgba(255, 255, 255, .72);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  margin-bottom: 26px;
}
.manifesto__title {
  font-size: clamp(44px, 7vw, 96px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -.02em;
  color: #fff;
}
.manifesto__line {
  margin-top: 30px;
  font-size: clamp(17px, 1.9vw, 22px);
  line-height: 1.8;
  color: rgba(255, 255, 255, .88);
}
.manifesto__cta {
  margin-top: 22px;
  font-size: clamp(20px, 2.2vw, 28px);
  font-weight: 800;
  color: var(--amber);
  letter-spacing: .02em;
}
.manifesto__note {
  margin-top: 46px;
  font-size: 13px;
  letter-spacing: .06em;
  color: rgba(255, 255, 255, .5);
}

/* --------------------------------------------------------------------------
   12. 未来探索
   -------------------------------------------------------------------------- */
.explore {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(18px, 2vw, 26px);
}
.explore__item {
  padding: 32px 28px;
  border-radius: var(--r-card);
  background: #fff;
  border: 1px solid var(--line-2);
  position: relative;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.explore__item:hover { transform: translateY(-5px); box-shadow: var(--sh-md); }
.explore__tag {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--blue-bright);
  background: var(--blue-tint);
  padding: 5px 11px;
  border-radius: var(--r-pill);
  margin-bottom: 18px;
}
.explore__title { font-size: 20px; font-weight: 700; color: var(--ink); margin-bottom: 10px; }
.explore__text { font-size: 15.5px; line-height: 1.8; color: var(--ink-3); }
.explore__foot {
  margin-top: 44px;
  text-align: center;
  font-size: clamp(17px, 1.7vw, 20px);
  font-weight: 700;
  color: var(--ink);
}
.explore__foot .dot { color: var(--orange); }

/* --------------------------------------------------------------------------
   13. 联系 / CTA 区块
   -------------------------------------------------------------------------- */
.contact-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(36px, 5vw, 76px);
  align-items: start;
}
.info-list { display: grid; gap: 4px; }
.info-list__row {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.info-list__row:first-child { border-top: 1px solid var(--line); }
.info-list__k { font-size: 14.5px; color: var(--ink-3); font-weight: 600; }
.info-list__v { font-size: 16px; color: var(--ink); font-weight: 600; word-break: break-word; }
.info-list__v a:hover { color: var(--blue); }

/* 预留占位（未确定信息） */
.pending {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 13px;
  border-radius: var(--r-pill);
  background: var(--bg-tint);
  border: 1px dashed rgba(0, 80, 168, .28);
  color: var(--ink-3);
  font-size: 13.5px;
  font-weight: 600;
}
.pending::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--amber);
}

/* 联系我们页：引导区（公司信息统一放在页脚蓝色区域） */
.contact-lead { max-width: 780px; }
.contact-lead__p {
  margin-top: 18px;
  font-size: 17.5px;
  line-height: 1.9;
  color: var(--ink-3);
}
.contact-cue {
  margin-top: clamp(48px, 5vw, 70px);
  padding-top: clamp(32px, 4vw, 46px);
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px 32px;
}
.contact-cue__text { font-size: 16.5px; color: var(--ink-3); line-height: 1.8; }
.contact-cue__text strong { color: var(--ink); font-weight: 700; }

/* --------------------------------------------------------------------------
   14. Footer
   -------------------------------------------------------------------------- */
.footer {
  background: var(--blue-deep);
  color: rgba(255, 255, 255, .72);
  padding-top: clamp(56px, 6vw, 84px);
  font-size: 15px;
}
.footer__top {
  display: grid;
  grid-template-columns: 1.5fr .85fr 1.7fr;
  gap: clamp(28px, 4vw, 60px);
  padding-bottom: 48px;
}
.footer__brand img { height: 52px; width: auto; margin-bottom: 22px; }
.footer__slogan {
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .01em;
  margin-bottom: 10px;
}
.footer__slogan2 { font-size: 15.5px; color: rgba(255, 255, 255, .8); }
.footer__cta { margin-top: 26px; }
.footer__h {
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .08em;
  margin-bottom: 20px;
}
.footer__links { display: grid; gap: 13px; }
.footer__links a { color: rgba(255, 255, 255, .72); font-size: 15px; transition: color .2s var(--ease); }
.footer__links a:hover { color: #fff; }

/* 联系信息（蓝色区域） */
.footer__info { display: grid; gap: 15px; }
.footer__info-row {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 14px;
  align-items: start;
}
.footer__info-k {
  font-size: 13.5px;
  line-height: 1.78;
  color: rgba(255, 255, 255, .5);
  letter-spacing: .02em;
  white-space: nowrap;
}
.footer__info-v {
  font-size: 15px;
  line-height: 1.78;
  color: rgba(255, 255, 255, .9);
  word-break: break-word;
}
.footer__info-v a {
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, .3);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.footer__info-v a:hover { color: var(--amber); border-color: var(--amber); }

/* 联系客服 · 二维码触发按钮 */
.qr-open {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--amber);
  border-bottom: 1px dashed rgba(252, 168, 0, .55);
  padding-bottom: 1px;
  text-align: left;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.qr-open svg { width: 17px; height: 17px; flex: 0 0 auto; }
.qr-open:hover { color: #fff; border-color: rgba(255, 255, 255, .8); }

/* 浅色背景上的二维码触发按钮（首页联系区块等） */
.qr-open--on-light { color: var(--blue); border-color: rgba(0, 80, 168, .38); }
.qr-open--on-light:hover { color: var(--orange); border-color: var(--orange); }

/* 预留：公众号 / 小程序（footer__qr 目前在 HTML 中处于隐藏/注释状态） */
.footer__qr { margin-top: 26px; }
.footer__qr-h {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: rgba(255, 255, 255, .5);
  margin-bottom: 14px;
}
.footer__qr-grid { display: flex; flex-wrap: wrap; gap: 20px; }
.footer__qr-item {
  display: grid;
  gap: 9px;
  justify-items: center;
  text-align: center;
}
.footer__qr-item img {
  width: 116px;
  height: 116px;
  border-radius: 14px;
  background: #fff;
  padding: 6px;
}
.footer__qr-item figcaption { font-size: 13px; color: rgba(255, 255, 255, .68); }
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, .14);
  padding-block: 26px 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 28px;
  align-items: center;
  justify-content: space-between;
  font-size: 13.5px;
  color: rgba(255, 255, 255, .58);
}
.footer__bottom a { color: rgba(255, 255, 255, .72); }
.footer__bottom a:hover { color: #fff; }
.footer__legal { display: flex; flex-wrap: wrap; gap: 8px 22px; align-items: center; }
.footer__icp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.footer__icp svg { width: 15px; height: 15px; opacity: .8; }

/* --------------------------------------------------------------------------
   14.1 客服微信二维码弹窗
   -------------------------------------------------------------------------- */
.qr-modal {
  position: fixed;
  inset: 0;
  z-index: 220;
  display: grid;
  place-items: center;
  padding: 20px;
}
.qr-modal[hidden] { display: none; }
.qr-modal__mask {
  position: absolute;
  inset: 0;
  background: rgba(8, 26, 48, .62);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
  animation: qrFade .25s var(--ease);
}
.qr-modal__panel {
  position: relative;
  z-index: 1;
  width: min(330px, 100%);
  background: #fff;
  border-radius: var(--r-card);
  padding: 32px 26px 28px;
  text-align: center;
  box-shadow: var(--sh-lg);
  animation: qrPop .3s var(--ease);
}
.qr-modal__title { font-size: 19px; font-weight: 800; color: var(--ink); }
.qr-modal__img {
  width: min(238px, 66vw);
  margin: 20px auto 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}
.qr-modal__img img { width: 100%; height: auto; }
.qr-modal__tip { margin-top: 16px; font-size: 14.5px; line-height: 1.7; color: var(--ink-3); }
.qr-modal__close {
  position: absolute;
  top: 12px; right: 12px;
  width: 38px; height: 38px;
  border-radius: 50%;
  display: grid; place-items: center;
  color: var(--ink-3);
  background: var(--bg-tint);
  transition: background .2s var(--ease), color .2s var(--ease);
}
.qr-modal__close:hover { background: var(--line); color: var(--ink); }
.qr-modal__close svg { width: 18px; height: 18px; }
@keyframes qrFade { from { opacity: 0; } }
@keyframes qrPop { from { opacity: 0; transform: translateY(12px) scale(.97); } }

/* --------------------------------------------------------------------------
   15. 内页通用
   -------------------------------------------------------------------------- */
.page-hero {
  padding-top: calc(var(--header-h) + clamp(52px, 7vw, 104px));
  padding-bottom: clamp(40px, 5vw, 72px);
  background: linear-gradient(180deg, var(--bg-warm) 0%, #fff 100%);
}
.page-hero__title {
  font-size: clamp(34px, 4.4vw, 58px);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -.015em;
  color: var(--ink);
}
.page-hero__sub {
  margin-top: 22px;
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.85;
  color: var(--ink-3);
  max-width: 44ch;
}
.page-hero--split {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: clamp(36px, 5vw, 72px);
  align-items: center;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13.5px;
  color: var(--ink-4);
  margin-bottom: 22px;
}
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb span { color: var(--ink-4); }

/* 数字列表（关于我们：我们关注什么） */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(20px, 2.4vw, 32px);
}
.stat__num {
  font-size: 15px;
  font-weight: 800;
  color: var(--orange);
  letter-spacing: .1em;
  margin-bottom: 14px;
}
.stat__title { font-size: 19px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.stat__text { font-size: 15px; line-height: 1.8; color: var(--ink-3); }
.stat { padding-top: 22px; border-top: 2px solid var(--line); }
.stat:nth-child(1) { border-top-color: rgba(0, 80, 168, .5); }
.stat:nth-child(2) { border-top-color: rgba(240, 96, 0, .5); }
.stat:nth-child(3) { border-top-color: rgba(124, 179, 66, .6); }
.stat:nth-child(4) { border-top-color: rgba(252, 168, 0, .6); }

/* 长文本区 */
.prose { max-width: 68ch; }
.prose p { margin-bottom: 1.4em; font-size: 17.5px; line-height: 1.95; color: var(--ink-2); }
.prose p:last-child { margin-bottom: 0; }
.prose .big { font-size: clamp(19px, 1.9vw, 23px); color: var(--ink); font-weight: 600; line-height: 1.8; }
.prose--center { max-width: 640px; margin-inline: auto; text-align: center; }

.pull-quote {
  padding: clamp(28px, 4vw, 44px) clamp(28px, 4vw, 48px);
  border-left: 3px solid var(--orange);
  background: var(--bg-warm);
  border-radius: 0 var(--r-card) var(--r-card) 0;
  font-size: clamp(19px, 2vw, 25px);
  line-height: 1.7;
  font-weight: 700;
  color: var(--ink);
}

/* 隐私政策文档 */
.doc { max-width: 780px; }
.doc h2 {
  font-size: 21px;
  font-weight: 700;
  color: var(--ink);
  margin: 40px 0 14px;
}
.doc h2:first-of-type { margin-top: 0; }
.doc p { margin-bottom: 14px; font-size: 16.5px; line-height: 1.95; color: var(--ink-2); }
.doc ul { margin: 0 0 16px; padding-left: 0; }
.doc li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 9px;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--ink-2);
}
.doc li::before {
  content: "";
  position: absolute;
  left: 4px; top: .78em;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--blue-bright);
}
.doc__meta {
  padding: 18px 22px;
  background: var(--bg-warm);
  border-radius: var(--r-btn);
  font-size: 14.5px;
  color: var(--ink-3);
  margin-bottom: 36px;
}

/* 404 —— 16:9 观感（视口宽度驱动，移动端安全） */
.err {
  min-height: clamp(360px, 52vw, 680px);
  display: grid;
  place-items: center;
  text-align: center;
  max-width: 100%;
  padding-top: var(--header-h);
}
.err__code {
  font-size: clamp(80px, 16vw, 160px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.03em;
  background: linear-gradient(120deg, var(--blue) 0%, var(--blue-bright) 55%, var(--orange) 120%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.err__title { margin-top: 18px; font-size: clamp(22px, 3vw, 32px); font-weight: 800; color: var(--ink); }
.err__text { margin-top: 14px; color: var(--ink-3); font-size: 17px; }
.err__actions { margin-top: 34px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* --------------------------------------------------------------------------
   16. 动画
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .75s var(--ease), transform .75s var(--ease);
  will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }
.reveal--d1 { transition-delay: .08s; }
.reveal--d2 { transition-delay: .16s; }
.reveal--d3 { transition-delay: .24s; }
.reveal--d4 { transition-delay: .32s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1 !important; transform: none !important; transition: none; }
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* --------------------------------------------------------------------------
   17. 响应式
   -------------------------------------------------------------------------- */

/* 大屏阶梯：内容区宽度跟随视口递增，让 1920 大屏也不显两侧空 */
@media (min-width: 1440px) {
  :root { --container: 1400px; --gutter: 28px; }
}
@media (min-width: 1680px) {
  :root { --container: 1560px; --gutter: 32px; }
}
@media (min-width: 1920px) {
  :root { --container: 1720px; --gutter: 40px; }
}

/* 图文交替：宽屏下让图片落到左列 */
@media (min-width: 1081px) {
  .split--reverse > *:last-child { order: -1; }
}

/* 小桌面 / 大平板 */
@media (max-width: 1080px) {
  body { font-size: 16.5px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .hero__grid,
  .split,
  .split--wide-left,
  .split--wide-right,
  .page-hero--split { grid-template-columns: 1fr; gap: 40px; }
  .section-head { margin-bottom: 40px; }
  .explore { grid-template-columns: repeat(2, 1fr); }
  .footer__top { grid-template-columns: 1fr 1fr; gap: 40px; }
  .footer__contact { grid-column: 1 / -1; }
  .collage {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(6, 1fr);
    aspect-ratio: 4 / 7;
  }
  .collage__a { grid-column: span 2; grid-row: span 2; }
  .collage__b,
  .collage__c,
  .collage__d,
  .collage__e { grid-column: span 1; grid-row: span 1; }
  .collage__f { grid-column: span 2; grid-row: span 1; }
  .collage__quote { grid-column: span 2; grid-row: span 1; }
  .contact-block { grid-template-columns: 1fr; gap: 40px; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); gap: 30px 24px; }
}

/* 平板：切换到移动导航 */
@media (max-width: 900px) {
  :root { --header-h: 68px; }
  .nav, .header__cta { display: none; }
  .burger { display: flex; }
  .header__logo img { height: 50px; }
  .section { padding-block: clamp(60px, 9vw, 88px); }
  .page-hero { padding-top: calc(var(--header-h) + 44px); }
  .manifesto { min-height: 460px; }
}

/* 手机 */
@media (max-width: 640px) {
  :root { --gutter: 18px; --container: 100%; }
  body { font-size: 16px; line-height: 1.85; }
  .section { padding-block: 58px; }
  .section--tight { padding-block: 46px; }

  .hero { padding-top: calc(var(--header-h) + 30px); }
  /* 手机端 Hero：上图 + 下文 */
  .hero__media { order: -1; }
  .hero__actions { margin-top: 30px; }
  .btn-row { gap: 12px; }
  .btn { padding: 14px 24px; font-size: 15.5px; }
  .btn--lg { padding: 15px 28px; font-size: 16px; }
  .btn--block-m { width: 100%; }
  .hero__meta { gap: 10px 22px; margin-top: 30px; padding-top: 20px; }

  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .explore { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr; }
  .explore__item, .tile { padding: 26px 24px; }
  .card__body { padding: 22px 22px 26px; }

  /* 手机端：拼贴改为纵向满宽排列，彻底避免挤压错位 */
  .collage {
    display: block;
    aspect-ratio: auto;
  }
  .collage > * { margin-bottom: 14px; }
  .collage > *:last-child { margin-bottom: 0; }
  .collage > .media,
  .collage > .ph { aspect-ratio: 16 / 9; height: auto; }
  .collage__quote { padding: 24px 22px; }
  .collage .ph__body { margin: 0 12px 12px; padding: 10px 12px; }
  .collage .ph__hint { display: none; }
  .collage .ph__tag { top: 11px; left: 11px; }

  .manifesto { min-height: 400px; }
  .manifesto__note { margin-top: 34px; }

  .footer__top { grid-template-columns: 1fr; gap: 34px; padding-bottom: 36px; }
  .footer__contact { grid-column: auto; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }

  .contact-cue { flex-direction: column; align-items: flex-start; gap: 18px; }
  .contact-cue .btn { width: 100%; justify-content: center; }
  .qr-modal__panel { padding: 28px 20px 24px; }

  .info-list__row { grid-template-columns: 1fr; gap: 5px; padding: 15px 0; }
  .pull-quote { border-radius: 0 var(--r-btn) var(--r-btn) 0; }

  .doc li, .doc p { font-size: 16px; }
}

/* 小屏手机 390 / 393 */
@media (max-width: 430px) {
  :root { --gutter: 16px; }
  .header__logo img { height: 44px; }
  .hero__title { font-size: clamp(34px, 10.5vw, 42px); }
  .manifesto__title { font-size: clamp(38px, 12vw, 52px); }
  .ph__body { margin: 0 14px 14px; padding: 12px 14px; }
  .ph__label { font-size: 13.5px; }
  .ph__hint { font-size: 12px; }
  .btn { padding: 13px 20px; }
  .footer__info-row { grid-template-columns: 80px 1fr; gap: 12px; }
  .footer__info-k { font-size: 12.5px; }
  .footer__info-v { font-size: 14.5px; }
  .contact-lead__p { font-size: 16.5px; }
}

/* 打印 */
@media print {
  .header, .drawer, .footer__cta, .btn, .qr-modal, .qr-open { display: none !important; }
  body { color: #000; }
}