/* =====================================================================
   顿角咖啡 Break Corner — 可编辑源码版样式表
   设计令牌（Design Tokens）均提取自原站：
     背景奶油 #F7F3EE / 主文字深棕 #2C1810 / 强调焦糖 #B8703F / 次要灰褐 #8C8279
   字体：标题用衬线 Noto Serif SC，正文用无衬线 Noto Sans SC
   如需改色，只改下面 :root 里的变量即可，全站联动。
   ===================================================================== */

:root {
  --color-bg: #F7F3EE;          /* 页面背景：奶油白 */
  --color-text: #2C1810;        /* 主文字：深棕 */
  --color-text-secondary: #8C8279; /* 次要文字：灰褐 */
  --color-accent: #B8703F;      /* 强调色：焦糖 */
  --color-dark: #2C1810;        /* 深色区块底色 */
  --color-divider: #E5DDD4;     /* 分割线 */

  --font-serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-en: "Playfair Display", "Noto Serif SC", serif; /* 英文小标签用衬线斜体更有格调 */

  --maxw: 1200px;
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 10px 30px rgba(44,24,16,.08);
  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-family: var(--font-serif); font-weight: 700; line-height: 1.25; margin: 0; }
p { margin: 0 0 1em; }

/* ---------- 布局工具 ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section--tight { padding: 64px 0; }
/* 锚点跳转时为固定导航留出空间 */
[id] { scroll-margin-top: 72px; }

/* 英文小标签（eyebrow） */
.eyebrow {
  display: block;
  font-family: var(--font-en);
  font-style: italic;
  font-size: 13px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(1.7rem, 3.2vw, 2.6rem);
  letter-spacing: .04em;
}
.section-lead { color: var(--color-text-secondary); max-width: 640px; margin: 16px auto 0; }
.text-center { text-align: center; }

/* 焦糖色短分割线 */
.divider-accent {
  width: 56px; height: 3px; border: 0;
  background: var(--color-accent);
  margin: 18px 0;
  border-radius: 2px;
}
.divider-accent.center { margin-left: auto; margin-right: auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px;
  font-size: 15px; font-weight: 500; cursor: pointer;
  border: 1px solid transparent; transition: all .25s var(--ease);
}
.btn-primary { background: var(--color-accent); color: #fff; }
.btn-primary:hover { background: #a3613a; transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-ghost { border-color: var(--color-divider); color: var(--color-text); background: transparent; }
.btn-ghost:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* ---------- 导航 ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  background: rgba(247,243,238,.82);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--color-divider);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo img { height: 34px; width: auto; }
.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-links a {
  font-size: 15px; color: var(--color-text); position: relative; padding: 4px 0;
  transition: color .2s;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 2px; width: 0;
  background: var(--color-accent); transition: width .25s var(--ease);
}
.nav-links a:hover, .nav-links a.active { color: var(--color-accent); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-right { display: flex; align-items: center; gap: 18px; }
.lang-toggle {
  border: 1px solid var(--color-divider); background: transparent;
  color: var(--color-text-secondary); border-radius: 999px;
  padding: 6px 14px; font-size: 13px; cursor: pointer; transition: all .2s;
}
.lang-toggle:hover { color: var(--color-accent); border-color: var(--color-accent); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--color-text); margin: 5px 0; transition: .3s; }

/* ---------- Hero 轮播 ---------- */
.hero { position: relative; height: 100vh; min-height: 620px; overflow: hidden; }
.hero-slides { position: absolute; inset: 0; }
.hero-slide {
  position: absolute; inset: 0; opacity: 0; transition: opacity 1s var(--ease);
  background-size: cover; background-position: center;
}
.hero-slide.active { opacity: 1; }
.hero-slide::after { /* 暗化遮罩，保证文字可读 */
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(44,24,16,.35), rgba(44,24,16,.55));
}
.hero-content {
  position: relative; z-index: 2; height: 100%;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; color: #fff; padding: 0 24px;
}
.hero-claim { font-size: clamp(2.2rem, 5vw, 4rem); letter-spacing: .06em; text-shadow: 0 2px 20px rgba(0,0,0,.3); }
.hero-sub { font-size: clamp(1rem, 2vw, 1.4rem); margin-top: 18px; opacity: .92; font-weight: 300; }
.hero-phone { margin-top: 26px; font-size: 15px; letter-spacing: .1em; opacity: .9; }
.hero-scroll {
  position: absolute; left: 50%; bottom: 34px; transform: translateX(-50%);
  z-index: 3; color: #fff; font-size: 12px; letter-spacing: .25em; opacity: .8;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
}
.hero-scroll .dot { width: 22px; height: 36px; border: 1.5px solid rgba(255,255,255,.7); border-radius: 12px; position: relative; }
.hero-scroll .dot::after { content: ""; position: absolute; left: 50%; top: 7px; transform: translateX(-50%); width: 3px; height: 7px; background: #fff; border-radius: 2px; animation: scrolldot 1.6s infinite; }
@keyframes scrolldot { 0% { opacity: 0; top: 7px; } 40% { opacity: 1; } 100% { opacity: 0; top: 18px; } }
.hero-dots { position: absolute; bottom: 30px; right: 30px; z-index: 3; display: flex; gap: 10px; }
.hero-dots button { width: 9px; height: 9px; border-radius: 50%; border: 0; background: rgba(255,255,255,.45); cursor: pointer; }
.hero-dots button.active { background: #fff; transform: scale(1.2); }

/* ---------- 理念 Philosophy ---------- */
.philosophy { background: var(--color-bg); }
.philosophy .lines { max-width: 760px; margin: 0 auto; text-align: center; font-size: clamp(1.1rem, 2.2vw, 1.5rem); line-height: 2.1; color: var(--color-text); }
.philosophy .lines .accent { color: var(--color-accent); font-family: var(--font-serif); }

/* ---------- 服务 Services ---------- */
.services { background: #fff; }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 48px; }
.service-card {
  border: 1px solid var(--color-divider); border-radius: var(--radius);
  padding: 34px 28px; background: var(--color-bg); transition: all .3s var(--ease);
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--color-accent); }
.service-num { font-family: var(--font-en); font-size: 30px; color: var(--color-accent); opacity: .65; }
.service-card h3 { font-size: 1.25rem; margin: 10px 0 12px; }
.service-card p { color: var(--color-text-secondary); font-size: 15px; margin: 0; }

/* ---------- 案例 Cases ---------- */
.cases { background: var(--color-bg); }
.case-card {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  border-radius: var(--radius); overflow: hidden; margin-top: 36px;
  box-shadow: var(--shadow-sm); background: #fff;
}
.case-media { min-height: 320px; background-size: cover; background-position: center; }
.case-body { padding: 44px; display: flex; flex-direction: column; justify-content: center; }
.case-tag { font-size: 13px; letter-spacing: .12em; color: var(--color-accent); }
.case-body h3 { font-size: 1.5rem; margin: 10px 0 14px; }
.case-body p { color: var(--color-text-secondary); }
.case-stats { margin-top: 14px; font-size: 14px; color: var(--color-text); letter-spacing: .04em; }
.case-card.reverse .case-media { order: 2; }

/* ---------- 品质 Quality ---------- */
.quality { background: #fff; }
.quality-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 44px; }
.quality-item { text-align: center; padding: 28px 18px; border-radius: var(--radius); background: var(--color-bg); }
.quality-item .icon { font-family: var(--font-en); font-size: 34px; color: var(--color-accent); }
.quality-item h3 { font-size: 1.15rem; margin: 12px 0 8px; }
.quality-item p { color: var(--color-text-secondary); font-size: 14px; margin: 0; }

/* ---------- 数据 Stats ---------- */
.stats { background: var(--color-dark); color: #fff; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat-num { font-family: var(--font-en); font-size: clamp(1.9rem, 3.8vw, 3.2rem); color: #fff; line-height: 1; white-space: nowrap; letter-spacing: -.01em; }
.stat-unit { font-size: 1.1rem; color: var(--color-accent); margin-left: 4px; }
.stat-label { margin-top: 12px; color: rgba(255,255,255,.7); letter-spacing: .08em; font-size: 14px; }

/* ---------- 关于 About ---------- */
.about { background: var(--color-bg); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.about-media { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
.about h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
.about-story p { color: var(--color-text-secondary); }
.about-mission {
  margin-top: 26px; padding: 22px 26px; border-left: 3px solid var(--color-accent);
  background: #fff; border-radius: 0 var(--radius) var(--radius) 0;
}
.about-mission .mt { font-family: var(--font-serif); color: var(--color-accent); font-size: 15px; letter-spacing: .1em; }
.about-mission p { margin: 6px 0 0; color: var(--color-text); }
.values-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 30px; }
.value-item { background: #fff; border: 1px solid var(--color-divider); border-radius: var(--radius); padding: 20px 22px; }
.value-item h4 { font-size: 1.05rem; color: var(--color-accent); margin-bottom: 6px; }
.value-item p { color: var(--color-text-secondary); font-size: 14px; margin: 0; }

/* ---------- VI 视觉规范 ---------- */
.vi-hero { position: relative; background: var(--color-dark); color: #fff; padding: 120px 0 90px; text-align: center; overflow: hidden; }
.vi-hero .bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: .12; }
.vi-hero h1 { font-size: clamp(2rem, 4vw, 3.4rem); }
.vi-block { padding: 80px 0; }
.vi-block.alt { background: #fff; }
.vi-logo-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; max-width: 760px; margin: 0 auto; }
.vi-logo-card { background: var(--color-bg); border-radius: var(--radius); padding: 40px; display: flex; flex-direction: column; align-items: center; gap: 14px; }
.vi-logo-card.dark { background: var(--color-dark); }
.vi-logo-card .cap { font-size: 11px; letter-spacing: .15em; color: var(--color-text-secondary); }
.vi-logo-card img { height: 64px; width: auto; }
.vi-colors { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; max-width: 880px; margin: 36px auto 0; }
.vi-color { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--color-divider); }
.vi-color .sw { height: 90px; }
.vi-color .meta { padding: 12px 14px; background: #fff; }
.vi-color .meta b { display: block; font-size: 14px; }
.vi-color .meta span { font-size: 12px; color: var(--color-text-secondary); }
.vi-items { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; }
.vi-item { background: var(--color-bg); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--color-divider); }
.vi-item img { width: 100%; height: 230px; object-fit: cover; }
.vi-item .vi-body { padding: 20px 22px; }
.vi-item .vi-body .en { font-family: var(--font-en); font-style: italic; font-size: 12px; letter-spacing: .15em; color: var(--color-accent); }
.vi-item .vi-body h4 { font-size: 1.1rem; margin: 4px 0 8px; }
.vi-item .vi-body p { color: var(--color-text-secondary); font-size: 14px; margin: 0; }

/* ---------- 联系 Contact ---------- */
.contact { background: var(--color-bg); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.contact h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
.contact-info p { color: var(--color-text-secondary); }
.contact-info .row { margin: 14px 0; }
.contact-info .row .lab { font-size: 13px; letter-spacing: .1em; color: var(--color-text-secondary); }
.contact-info .row .val { font-size: 1.1rem; }
.contact-form { background: #fff; border: 1px solid var(--color-divider); border-radius: var(--radius); padding: 32px; }
.contact-form label { display: block; font-size: 13px; color: var(--color-text-secondary); margin: 14px 0 6px; }
.contact-form input, .contact-form textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--color-divider);
  border-radius: 10px; font-family: var(--font-sans); font-size: 15px; background: var(--color-bg);
  transition: border-color .2s;
}
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: var(--color-accent); }
.contact-form textarea { min-height: 110px; resize: vertical; }
.contact-form .btn { margin-top: 18px; width: 100%; justify-content: center; }
.form-note { margin-top: 14px; font-size: 14px; color: var(--color-accent); text-align: center; min-height: 20px; }

/* ---------- 页脚 Footer ---------- */
.footer { background: var(--color-dark); color: rgba(255,255,255,.75); padding: 56px 0 30px; }
.footer-grid { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 30px; }
.footer .brand-desc { max-width: 360px; color: rgba(255,255,255,.7); }
.footer-links { display: flex; gap: 26px; flex-wrap: wrap; }
.footer-links a:hover { color: var(--color-accent); }
.footer-bottom { margin-top: 36px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); font-size: 13px; color: rgba(255,255,255,.5); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* ---------- 滚动揭示动画 ----------
   只有 JS 可用时才隐藏内容：无 JS、脚本被拦截、iframe 预览里
   IntersectionObserver 不触发时，正文仍完整可见，避免空白页。 */
.js .reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .reveal.in, .js .always-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- 子页面头部 / CTA（多页结构共用） ---------- */
.subhero { padding: 150px 0 56px; background: var(--color-bg); text-align: center; }
.subhero .eyebrow { justify-content: center; }
.subhero h1 { font-size: clamp(2rem, 4vw, 3rem); }
.subhero .lead { color: var(--color-text-secondary); max-width: 640px; margin: 16px auto 0; }
.more-link { display: inline-block; margin-top: 22px; color: var(--color-accent); font-weight: 500; letter-spacing: .05em; }
.more-link:hover { text-decoration: underline; }
.cta-band { background: var(--color-dark); color: #fff; text-align: center; padding: 76px 0; }
.cta-band h2 { color: #fff; }
.cta-band .lead { color: rgba(255,255,255,.75); max-width: 600px; margin: 14px auto 0; }
.cta-band .btn-primary { margin-top: 24px; }
/* 与首页同源：子页区块复用 .section 等通用类 */

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .quality-grid, .vi-items, .vi-colors { grid-template-columns: repeat(2, 1fr); }
  .case-card, .case-card.reverse { grid-template-columns: 1fr; }
  .case-card.reverse .case-media { order: 0; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 36px 16px; }
}
@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .nav-links {
    position: fixed; inset: 64px 0 auto 0; flex-direction: column; gap: 0;
    background: var(--color-bg); border-bottom: 1px solid var(--color-divider);
    padding: 10px 0; transform: translateY(-120%); transition: transform .3s var(--ease);
  }
  .nav-links.open { transform: none; }
  .nav-links a { padding: 14px 24px; width: 100%; }
  .nav-toggle { display: block; }
  .services-grid, .quality-grid, .vi-items, .vi-colors, .values-grid { grid-template-columns: 1fr; }
  .vi-logo-grid { grid-template-columns: 1fr; }
}