/* ==========================================================================
   cozunet.com · 全站基础样式 base.css
   风格：床头柜极简 · 浅灰 / 纯白 / 深棕
   职责：设计变量、复位、基础版式、顶部联系条、右侧垂直导航、移动端菜单、
         页脚、按钮/表单/表格/标签、滚动渐入与通用动效
   每页独有样式 → css/pages/<页面名>.css（不要在本文件加页面专属样式）
   ========================================================================== */

:root{
  /* 色彩 · 床头柜极简 */
  --paper:#f3f1ed;        /* 浅灰米 · 页面底 */
  --card:#ffffff;         /* 纯白 · 卡片底 */
  --cream:#faf9f6;        /* 奶油白 */
  --ink:#2e2a26;          /* 正文深色 */
  --ink-2:#5c564e;        /* 次级文字 */
  --muted:#978f87;        /* 弱化文字 */
  --line:#e6e1d8;         /* 分隔线 */
  --line-2:#f0ece6;       /* 更浅分隔线 */
  --brown:#4b3a2c;        /* 深棕 · 主色 */
  --brown-deep:#34281c;   /* 深棕 · 按压/深底 */
  --brown-soft:#8a7360;   /* 浅棕 */
  --brown-bg:#f0ebe4;     /* 棕调浅底 */
  --shadow:0 20px 44px -26px rgba(43,34,26,.32);
  --shadow-sm:0 10px 24px -16px rgba(43,34,26,.24);
  --r:14px;
  --r-sm:9px;

  /* 字体 */
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-serif:Georgia,"Times New Roman","Songti SC","STSong","SimSun",serif;

  --ease:cubic-bezier(.22,.61,.36,1);
  --rail-w:84px;
}

/* ---------- 复位 ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-sans);
  font-size:16px;line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
@media (min-width:1025px){ body{padding-right:var(--rail-w)} }
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button,input,textarea,select{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
::selection{background:var(--brown);color:#fff}

/* 细滚动条 */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#cfc8bd;border-radius:8px;border:2px solid var(--paper)}
::-webkit-scrollbar-track{background:transparent}

/* ---------- 版式容器 ---------- */
.wrap{max-width:1200px;margin:0 auto;padding:0 28px}
@media (max-width:640px){ .wrap{padding:0 18px} }

/* 展示性大标题用衬线（床头柜杂志感），正文无衬线 */
h1,h2,h3{font-family:var(--font-serif);font-weight:600;line-height:1.32;color:var(--ink)}
h1{font-size:clamp(30px,4.4vw,56px)}
h2{font-size:clamp(24px,3.2vw,38px)}
h3{font-size:clamp(19px,2.2vw,26px)}
h4,h5{font-family:var(--font-sans);font-weight:600}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 30px;border-radius:999px;
  background:var(--brown);color:#fff;
  font-size:15px;letter-spacing:.06em;font-weight:500;
  border:1px solid var(--brown);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),background .35s var(--ease),color .35s var(--ease);
  box-shadow:0 12px 26px -16px rgba(75,58,44,.55);
}
.btn:hover{transform:translateY(-3px);background:var(--brown-deep);box-shadow:0 18px 34px -18px rgba(75,58,44,.6)}
.btn:active{transform:translateY(-1px)}
.btn .arw{transition:transform .35s var(--ease)}
.btn:hover .arw{transform:translateX(5px)}
.btn-line{background:transparent;color:var(--brown);border-color:var(--brown);box-shadow:none}
.btn-line:hover{background:var(--brown);color:#fff}
.btn-paper{background:var(--cream);color:var(--brown);border-color:var(--line)}
.btn-paper:hover{background:#fff}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);box-shadow:none}
.btn-ghost:hover{background:#fff;color:var(--brown)}
.btn-sm{padding:9px 20px;font-size:13.5px}

/* ---------- 区块标题（每页可微调，但语义一致） ---------- */
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12.5px;letter-spacing:.32em;color:var(--brown-soft);
  text-transform:uppercase;
}
.sec-eyebrow::before{content:"";width:34px;height:1px;background:var(--brown-soft)}
.sec-head{margin-bottom:44px;position:relative}
.sec-title{margin:10px 0 14px}
.sec-desc{color:var(--ink-2);max-width:640px;font-size:15.5px}
.sec-head.center{text-align:center}
.sec-head.center .sec-desc{margin-left:auto;margin-right:auto}
.sec-head.center .sec-eyebrow::after{content:"";width:34px;height:1px;background:var(--brown-soft)}

/* ---------- 卡片/标签/表格 基础 ---------- */
.card{background:var(--card);border-radius:var(--r);border:1px solid var(--line-2);transition:transform .45s var(--ease),box-shadow .45s var(--ease)}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.chip{display:inline-flex;align-items:center;gap:6px;padding:5px 14px;border-radius:999px;background:var(--brown-bg);color:var(--brown-soft);font-size:12.5px;letter-spacing:.08em}
.chip.brown{background:var(--brown);color:#fff}
.tbl{width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--r);overflow:hidden;font-size:14.5px}
.tbl th{background:var(--brown-bg);color:var(--brown-deep);text-align:left;padding:14px 18px;font-weight:600}
.tbl td{padding:14px 18px;border-top:1px solid var(--line-2);color:var(--ink-2)}
.tbl tr:hover td{background:var(--cream)}

/* ---------- 表单 ---------- */
.field{width:100%;padding:13px 16px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--card);font-size:15px;transition:border-color .3s,box-shadow .3s;outline:none}
.field:focus{border-color:var(--brown-soft);box-shadow:0 0 0 3px rgba(138,115,96,.14)}
textarea.field{min-height:130px;resize:vertical}
.form-label{display:block;font-size:13px;color:var(--ink-2);margin-bottom:7px;letter-spacing:.05em}

/* ==========================================================================
   顶部联系条 .topbar（全站统一 · 固定 · 滚动变色）
   ========================================================================== */
.topbar{
  position:fixed;top:0;left:0;right:0;z-index:990;
  background:rgba(243,241,237,.86);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-2);
  transition:background .4s var(--ease),box-shadow .4s var(--ease);
}
@media (min-width:1025px){ .topbar{right:var(--rail-w)} }
.topbar.scrolled{background:rgba(255,255,255,.96);box-shadow:0 14px 34px -26px rgba(43,34,26,.35);border-bottom-color:var(--line)}
.topbar-in{display:flex;align-items:center;justify-content:space-between;height:64px;gap:18px}
.topbar-brand{display:flex;align-items:center;gap:10px;flex:none}
.topbar-brand img{border-radius:6px}
.brand-name{font-family:var(--font-serif);font-size:21px;letter-spacing:.02em;color:var(--brown-deep);display:flex;align-items:baseline;gap:8px}
.brand-name em{font-family:var(--font-sans);font-style:normal;font-size:11.5px;letter-spacing:.28em;color:var(--brown-soft)}
.topbar-contact{display:flex;align-items:center;gap:26px}
.tc{display:inline-flex;align-items:center;gap:7px;font-size:13.5px;color:var(--ink-2);transition:color .3s}
.tc svg{width:15px;height:15px;stroke:var(--brown);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.tc:hover{color:var(--brown)}
.tc-tel{font-weight:600;color:var(--brown);font-size:15px}
.tc-wx{position:relative;cursor:default}
@media (max-width:1100px){ .tc-mail{display:none} }
@media (max-width:900px){ .topbar-contact{display:none} }

/* 汉堡按钮（≤900px 显示） */
.burger{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:var(--card);padding:0 11px;transition:background .3s}
.burger span{display:block;height:2px;width:100%;background:var(--brown);border-radius:2px;transition:transform .35s var(--ease),opacity .3s}
body.menu-open .burger{background:var(--brown)}
body.menu-open .burger span{background:#fff}
body.menu-open .burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.menu-open .burger span:nth-child(2){opacity:0}
body.menu-open .burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media (max-width:900px){ .burger{display:flex} }

/* ==========================================================================
   右侧垂直固定导航 .rail（≥1025px 显示，全站统一）
   ========================================================================== */
.rail{
  position:fixed;top:0;right:0;bottom:0;width:var(--rail-w);z-index:980;
  background:var(--card);border-left:1px solid var(--line);
  display:flex;flex-direction:column;align-items:center;justify-content:space-between;
  padding:26px 0 20px;
}
.rail-brand{display:block}
.rail-brand img{width:36px;height:36px;border-radius:7px}
.rail-nav{display:flex;flex-direction:column;align-items:center;gap:6px;flex:1;justify-content:center;padding:18px 0}
.rail-link{
  position:relative;display:flex;flex-direction:column;align-items:center;gap:6px;
  width:var(--rail-w);padding:8px 0 7px;color:var(--muted);
  transition:color .3s;
}
.rail-link .rl-dot{width:5px;height:5px;border-radius:50%;background:var(--line);transition:background .3s,width .3s,border-radius .3s}
.rail-link span{font-size:12px;letter-spacing:.14em;writing-mode:vertical-rl;text-orientation:upright;line-height:1.1}
.rail-link:hover{color:var(--brown)}
.rail-link:hover .rl-dot{background:var(--brown-soft)}
.rail-link.on{color:var(--brown)}
.rail-link.on .rl-dot{width:17px;height:5px;border-radius:4px;background:var(--brown)}
.rail-foot{display:flex;flex-direction:column;align-items:center;gap:14px}
.rail-phone{
  display:flex;flex-direction:column;align-items:center;gap:7px;color:var(--brown);
  writing-mode:vertical-rl;text-orientation:upright;font-size:12.5px;letter-spacing:.14em;
}
.rail-phone b{font-weight:600}
.rail-cta{
  font-size:11.5px;letter-spacing:.2em;color:#fff;background:var(--brown);
  padding:9px 12px;border-radius:999px;transition:background .3s;
}
.rail-cta:hover{background:var(--brown-deep)}
@media (max-width:1024px){ .rail{display:none} }

/* ==========================================================================
   移动端滑出菜单 .mnav（≤900px 与汉堡联动）
   ========================================================================== */
.mnav-mask{position:fixed;inset:0;background:rgba(38,31,25,.45);z-index:1060;opacity:0;visibility:hidden;transition:opacity .4s var(--ease),visibility .4s}
.mnav{
  position:fixed;top:0;right:0;bottom:0;width:min(360px,86vw);z-index:1070;
  background:var(--card);transform:translateX(102%);transition:transform .5s var(--ease);
  display:flex;flex-direction:column;padding:26px 30px 34px;overflow-y:auto;
  box-shadow:-30px 0 60px -40px rgba(43,34,26,.5);
}
body.menu-open .mnav{transform:translateX(0)}
body.menu-open .mnav-mask{opacity:1;visibility:visible}
.mnav-head{display:flex;align-items:center;gap:10px;padding-bottom:22px;border-bottom:1px solid var(--line-2);margin-bottom:18px}
.mnav-head img{width:34px;height:34px;border-radius:7px}
.mnav-head span{font-family:var(--font-serif);font-size:20px;color:var(--brown-deep)}
.mnav-list li{border-bottom:1px dashed var(--line-2)}
.mnav-list a{display:flex;align-items:center;gap:14px;padding:15px 2px;font-size:16px;color:var(--ink-2);transition:color .3s,padding-left .3s}
.mnav-list a i{font-style:normal;font-size:11px;letter-spacing:.2em;color:var(--brown-soft);font-family:var(--font-serif)}
.mnav-list a:hover{color:var(--brown);padding-left:8px}
.mnav-contact{margin-top:22px;display:grid;gap:10px;font-size:14px;color:var(--ink-2)}
.mnav-contact a:hover{color:var(--brown)}
.mnav-cta{display:block;text-align:center;margin-top:24px;padding:14px;border-radius:999px;background:var(--brown);color:#fff;font-size:15px;letter-spacing:.08em}
.mnav-cta:hover{background:var(--brown-deep)}
@media (min-width:901px){ .mnav,.mnav-mask{display:none} }

/* ==========================================================================
   页脚 .site-foot（全站统一）
   ========================================================================== */
.site-foot{margin-top:90px;background:var(--brown-deep);color:#d9d2c8}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:44px;padding:64px 28px 46px;max-width:1200px;margin:0 auto}
@media (max-width:900px){ .foot-grid{grid-template-columns:1fr 1fr;gap:34px;padding:48px 18px 36px} }
@media (max-width:540px){ .foot-grid{grid-template-columns:1fr} }
.foot-brand a{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.foot-brand img{width:40px;height:40px;border-radius:8px}
.foot-brand .brand-name{color:#fff;font-size:22px}
.foot-brand .brand-name em{color:rgba(255,255,255,.55)}
.foot-brand p{font-size:14px;line-height:2;color:rgba(255,255,255,.62);margin-bottom:18px;max-width:320px}
.foot-wx{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:#fff;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);padding:8px 16px;border-radius:999px}
.foot-col h4{color:#fff;font-size:15px;letter-spacing:.12em;margin-bottom:18px;position:relative;padding-bottom:10px}
.foot-col h4::after{content:"";position:absolute;left:0;bottom:0;width:24px;height:2px;background:var(--brown-soft)}
.foot-col ul{display:grid;gap:11px}
.foot-col a{font-size:14px;color:rgba(255,255,255,.62);transition:color .3s,padding-left .3s}
.foot-col a:hover{color:#fff;padding-left:6px}
.foot-contact p{font-size:14px;color:rgba(255,255,255,.62);margin-bottom:9px}
.foot-contact a:hover{color:#fff}
.foot-bar{border-top:1px solid rgba(255,255,255,.12)}
.foot-bar .wrap{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;padding-top:20px;padding-bottom:22px;font-size:13px;color:rgba(255,255,255,.5)}
.foot-links{display:flex;gap:20px}
.foot-links a:hover{color:#fff}

/* ==========================================================================
   滚动渐入 .reveal
   ========================================================================== */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}
.d1{transition-delay:.08s}.d2{transition-delay:.16s}.d3{transition-delay:.24s}
.d4{transition-delay:.32s}.d5{transition-delay:.4s}.d6{transition-delay:.48s}

/* 通用悬浮箭头（案例卡等） */
.arrow-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--brown);font-weight:500}
.arrow-link svg{width:16px;height:16px;transition:transform .35s var(--ease)}
.arrow-link:hover svg{transform:translateX(6px)}

/* 返回顶部 */
.totop{
  position:fixed;right:16px;bottom:22px;z-index:900;
  width:44px;height:44px;border-radius:50%;background:var(--card);
  border:1px solid var(--line);color:var(--brown);display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:all .4s var(--ease);box-shadow:var(--shadow-sm);
}
.totop.show{opacity:1;visibility:visible;transform:none}
.totop:hover{background:var(--brown);color:#fff}
.totop svg{width:17px;height:17px}
@media (min-width:1025px){ .totop{right:calc(var(--rail-w) + 16px)} }

/* 面包屑 */
.crumb{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--muted);flex-wrap:wrap}
.crumb a:hover{color:var(--brown)}
.crumb i{font-style:normal;color:var(--line)}
.crumb .now{color:var(--brown-soft)}

/* 无 JS 时的降级：.reveal 不隐藏 */
.no-js .reveal{opacity:1;transform:none}

/* ==========================================================================
   通用内容组件（供各页 css/pages 复用）：FAQ / 流程 / 保障 / 数据条
   ========================================================================== */
.g-sec{padding:44px 0}
.g-sec-gap{padding-top:0}
.g-sec-in{max-width:1080px;margin:0 auto}
.g-lead{color:var(--ink-2);line-height:2;font-size:15px;max-width:820px;margin:18px auto 0}
.g-faq-list{display:grid;gap:14px;max-width:880px;margin:24px auto 0}
.g-faq-list details{background:var(--card);border:1px solid var(--line-2);border-radius:var(--r);padding:18px 24px}
.g-faq-list summary{cursor:pointer;font-weight:600;color:var(--brown-deep);list-style:none}
.g-faq-list summary::-webkit-details-marker{display:none}
.g-faq-list summary::before{content:"Q";display:inline-block;width:22px;height:22px;line-height:22px;text-align:center;border-radius:50%;background:var(--brown-bg);color:#fff;font-size:12px;margin-right:10px}
.g-faq-list p{color:var(--ink-2);font-size:14.5px;line-height:1.9;margin:12px 0 0 32px}
.g-flow{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:26px}
.g-flow li{background:var(--card);border:1px solid var(--line-2);border-radius:var(--r);padding:22px 18px}
.g-flow b{font-family:var(--font-serif);font-size:26px;color:var(--brown-bg);display:block;margin-bottom:8px}
.g-flow h3{font-size:15.5px;margin-bottom:7px}
.g-flow p{font-size:13px;color:var(--ink-2);line-height:1.7}
.g-guarantee{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:26px}
.g-guarantee li{background:var(--card);border:1px solid var(--line-2);border-radius:var(--r);padding:24px 22px}
.g-guarantee b{font-size:16px;color:var(--brown-deep);display:block;margin-bottom:8px}
.g-guarantee p{font-size:13.5px;color:var(--ink-2);line-height:1.8}
@media (max-width:1024px){
  .g-flow{grid-template-columns:1fr 1fr}
  .g-guarantee{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .g-flow,.g-guarantee{grid-template-columns:1fr}
}