@charset "utf-8";
/* ==========================================================================
   一条长河网 · 全站基础设计系统 base.css
   风格：咖啡潮流风  奶白 + 深棕 + 浅粉
   说明：纯手写，无框架依赖；仅提供令牌/重置/排版/导航/页脚/通用组件/动画
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  /* 奶白系（底色） */
  --cream-50:#FCF8F1;
  --cream-100:#F7F0E4;
  --cream-200:#EFE5D4;
  --cream-300:#E6D8C0;

  /* 深棕系（文字/深色块） */
  --brown-900:#211610;
  --brown-800:#2C1E15;
  --brown-700:#3C2A1C;
  --brown-600:#4D3624;
  --brown-500:#6B4A2F;

  /* 咖啡过渡色 */
  --coffee:#8A5A3B;
  --coffee-light:#A9764A;
  --latte:#C9A179;
  --foam:#E7D2B4;

  /* 浅粉点缀 */
  --pink-200:#F3C9BE;
  --pink-300:#E7A797;
  --pink-400:#D98773;
  --pink-500:#C46A54;

  /* 功能色 */
  --ink:#2A1D13;
  --muted:#8C7560;
  --line:#E0D3BE;
  --white:#fff;

  /* 字体 */
  --f-serif:Georgia,"Songti SC","Source Han Serif SC","Noto Serif SC",serif;
  --f-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  --f-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;

  /* 尺寸 */
  --nav-h:70px;
  --wrap:1240px;
  --radius:14px;
  --radius-lg:22px;
  --shadow-sm:0 6px 18px rgba(60,40,24,.08);
  --shadow:0 18px 44px rgba(60,40,24,.13);
  --shadow-lg:0 30px 80px rgba(40,25,15,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--f-sans);
  color:var(--ink);
  background:var(--cream-100);
  line-height:1.75;
  font-size:16px;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .25s var(--ease)}
a:hover{color:var(--pink-400)}
ul,ol{list-style:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea,select{font:inherit;color:inherit}
::selection{background:var(--pink-300);color:#fff}

/* ---------- 3. 排版 ---------- */
h1,h2,h3,h4,h5{font-family:var(--f-serif);font-weight:700;line-height:1.25;color:var(--brown-900);letter-spacing:.5px}
h1{font-size:clamp(2.1rem,5vw,3.5rem)}
h2{font-size:clamp(1.7rem,3.4vw,2.6rem)}
h3{font-size:clamp(1.3rem,2.2vw,1.7rem)}
p{color:var(--brown-700)}
.lead{font-size:1.15rem;color:var(--brown-600)}
.mono{font-family:var(--f-mono);font-size:.9em}
.eyebrow{
  font-family:var(--f-mono);font-size:.78rem;letter-spacing:.32em;text-transform:uppercase;
  color:var(--coffee);font-weight:700;display:inline-flex;align-items:center;gap:.6em;
}
.eyebrow::before{content:"";width:34px;height:2px;background:var(--coffee)}
.eyebrow.center::before{display:none}
.serif-accent{font-family:var(--f-serif);font-style:italic;color:var(--pink-400)}

/* ---------- 4. 布局 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:28px}
.wrap-narrow{max-width:880px;margin-inline:auto;padding-inline:28px}
.section{padding:88px 0;position:relative}
.section.tight{padding:56px 0}
.section.tighter{padding:38px 0}
.bg-cream{background:var(--cream-50)}
.bg-cream-2{background:var(--cream-200)}
.bg-brown{background:var(--brown-800);color:var(--cream-100)}
.bg-brown h2,.bg-brown h3,.bg-brown h4{color:var(--cream-50)}
.bg-brown p{color:var(--cream-200)}
.bg-gradient-coffee{background:linear-gradient(135deg,#2C1E15 0%,#4D3624 60%,#6B4A2F 100%);color:var(--cream-100)}
.bg-gradient-coffee h2,.bg-gradient-coffee h3{color:var(--cream-50)}
.bg-gradient-coffee p{color:var(--cream-200)}

/* 自定义非对称栅格 */
.grid{display:grid;gap:30px}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
.asym-7-5{grid-template-columns:7fr 5fr}
.asym-5-7{grid-template-columns:5fr 7fr}
.asym-8-4{grid-template-columns:8fr 4fr}
.asym-4-8{grid-template-columns:4fr 8fr}
.asym-3-9{grid-template-columns:3fr 9fr}

/* 板头标题区（非对称） */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-bottom:48px;flex-wrap:wrap}
.sec-head .txt{max-width:620px}
.sec-head h2{margin-top:14px}
.sec-head .more{
  font-family:var(--f-mono);font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brown-700);border-bottom:2px solid var(--pink-300);padding-bottom:4px;white-space:nowrap;
}
.sec-head .more:hover{color:var(--pink-500);border-color:var(--pink-500)}
.sec-head.center{flex-direction:column;align-items:center;text-align:center}

/* ---------- 5. 顶部固定导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--nav-h);
  display:flex;align-items:center;
  background:rgba(252,248,241,.0);
  transition:background .4s var(--ease),box-shadow .4s var(--ease),height .4s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(252,248,241,.92);
  backdrop-filter:saturate(160%) blur(10px);
  -webkit-backdrop-filter:saturate(160%) blur(10px);
  box-shadow:0 8px 30px rgba(60,40,24,.10);
  border-bottom:1px solid var(--line);
  height:62px;
}
.site-header.on-dark{background:rgba(33,22,16,.35)}
.site-header.on-dark.scrolled{background:rgba(252,248,241,.94)}
.nav-inner{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:28px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;font-family:var(--f-serif);font-weight:700;font-size:1.22rem;color:var(--brown-900);letter-spacing:.5px}
.site-header.on-dark:not(.scrolled) .brand{color:var(--cream-50)}
.brand .mark{width:38px;height:38px;flex:none}
.brand small{display:block;font-family:var(--f-mono);font-size:.6rem;letter-spacing:.28em;color:var(--coffee);font-weight:600;text-transform:uppercase;margin-top:-2px}

.nav-links{display:flex;align-items:center;gap:6px}
.nav-links>li>a{
  position:relative;display:inline-block;padding:10px 14px;font-size:.95rem;font-weight:500;
  color:var(--brown-700);border-radius:8px;
}
.site-header.on-dark:not(.scrolled) .nav-links>li>a{color:var(--cream-100)}
.nav-links>li>a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;background:var(--pink-400);
  transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease);
}
.nav-links>li>a:hover::after,.nav-links>li.active>a::after{transform:scaleX(1)}
.nav-links>li>a:hover{color:var(--pink-500)}

/* 下拉 */
.has-drop{position:relative}
.has-drop>a::after{content:"▾";margin-left:6px;font-size:.7em;opacity:.7}
.drop{
  position:absolute;top:calc(100% + 10px);left:0;min-width:230px;
  background:var(--cream-50);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:10px;opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all .28s var(--ease);
}
.has-drop:hover .drop,.has-drop:focus-within .drop{opacity:1;visibility:visible;transform:translateY(0)}
.drop a{display:block;padding:9px 12px;border-radius:8px;font-size:.92rem;color:var(--brown-700)}
.drop a:hover{background:var(--cream-200);color:var(--pink-500)}

.nav-cta{display:flex;align-items:center;gap:14px}
.btn-nav{
  font-family:var(--f-mono);font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;font-weight:700;
  padding:9px 18px;border-radius:30px;background:var(--brown-800);color:var(--cream-50);
  transition:all .3s var(--ease);
}
.btn-nav:hover{background:var(--pink-400);color:#fff;transform:translateY(-2px)}

/* 汉堡 */
.burger{display:none;width:46px;height:46px;border-radius:10px;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.burger span{width:22px;height:2px;background:var(--brown-800);border-radius:2px;transition:all .3s var(--ease)}
.site-header.on-dark:not(.scrolled) .burger span{background:var(--cream-50)}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;inset:0 0 0 auto;width:min(86vw,380px);z-index:1100;
  background:var(--cream-50);box-shadow:var(--shadow-lg);padding:90px 26px 40px;
  transform:translateX(100%);transition:transform .4s var(--ease);overflow-y:auto;
}
.mobile-drawer.open{transform:translateX(0)}
.mobile-drawer a{display:block;padding:13px 6px;border-bottom:1px solid var(--line);font-size:1rem;color:var(--brown-800);font-weight:500}
.mobile-drawer .sub a{padding-left:20px;font-size:.9rem;color:var(--brown-600)}
.scrim{position:fixed;inset:0;background:rgba(33,22,16,.45);z-index:1050;opacity:0;visibility:hidden;transition:all .35s var(--ease)}
.scrim.open{opacity:1;visibility:visible}

/* ---------- 6. 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--f-mono);font-size:.84rem;letter-spacing:.1em;text-transform:uppercase;font-weight:700;padding:14px 26px;border-radius:32px;transition:all .32s var(--ease);cursor:pointer;white-space:nowrap}
.btn-primary{background:var(--brown-800);color:var(--cream-50)}
.btn-primary:hover{background:var(--pink-400);color:#fff;transform:translateY(-3px);box-shadow:0 14px 30px rgba(201,106,84,.35)}
.btn-ghost{border:1.5px solid var(--brown-700);color:var(--brown-800)}
.btn-ghost:hover{background:var(--brown-800);color:var(--cream-50);transform:translateY(-3px)}
.btn-pink{background:var(--pink-300);color:#fff}
.btn-pink:hover{background:var(--pink-500);transform:translateY(-3px);box-shadow:0 14px 30px rgba(196,106,84,.4)}
.btn-light{background:var(--cream-50);color:var(--brown-800)}
.btn-light:hover{background:var(--pink-200);transform:translateY(-3px)}
.btn .arr{transition:transform .3s var(--ease)}
.btn:hover .arr{transform:translateX(5px)}

/* ---------- 7. 通用组件 ---------- */
.tag{display:inline-flex;align-items:center;gap:6px;font-family:var(--f-mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;font-weight:700;padding:5px 12px;border-radius:20px;background:var(--cream-200);color:var(--coffee)}
.tag.pink{background:var(--pink-200);color:var(--pink-500)}
.tag.brown{background:var(--brown-800);color:var(--latte)}

.card{background:var(--cream-50);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .4s var(--ease),box-shadow .4s var(--ease)}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}

.divider-coffee{display:flex;align-items:center;gap:14px;color:var(--coffee);justify-content:center}
.divider-coffee::before,.divider-coffee::after{content:"";height:1px;flex:1;max-width:120px;background:linear-gradient(90deg,transparent,var(--latte),transparent)}
.divider-coffee svg{width:22px;height:22px}

/* 面包屑 */
.crumbs{font-family:var(--f-mono);font-size:.78rem;letter-spacing:.06em;color:var(--muted);display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.crumbs a:hover{color:var(--pink-400)}
.crumbs span{opacity:.5}

/* 分页（保留通用样式，新闻列表按要求不渲染分页） */
.pager{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:48px}
.pager a,.pager span{min-width:44px;height:44px;padding:0 14px;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;border:1px solid var(--line);font-family:var(--f-mono);font-size:.85rem;color:var(--brown-700);background:var(--cream-50)}
.pager a:hover{border-color:var(--pink-300);color:var(--pink-500)}
.pager .active{background:var(--brown-800);color:var(--cream-50);border-color:var(--brown-800)}

/* 返回顶部 */
.to-top{position:fixed;right:26px;bottom:26px;width:50px;height:50px;border-radius:50%;background:var(--brown-800);color:var(--cream-50);display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(20px);transition:all .35s var(--ease);z-index:900}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--pink-400)}

/* ---------- 8. 页脚（大型多区域，非简单栏） ---------- */
.site-footer{background:var(--brown-900);color:var(--cream-200);position:relative;overflow:hidden}
.site-footer::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 85% -10%,rgba(201,106,84,.22),transparent 55%);pointer-events:none}
.foot-top{padding:74px 0 56px;position:relative}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:48px}
.foot-brand .brand{color:var(--cream-50)}
.foot-brand .brand small{color:var(--latte)}
.foot-brand p{color:var(--cream-300);margin-top:18px;max-width:340px;font-size:.95rem}
.foot-socials{display:flex;gap:12px;margin-top:24px}
.foot-socials a{width:42px;height:42px;border-radius:50%;border:1px solid rgba(231,210,180,.25);display:flex;align-items:center;justify-content:center;color:var(--cream-200)}
.foot-socials a:hover{background:var(--pink-400);border-color:var(--pink-400);color:#fff;transform:translateY(-3px)}
.foot-col h4{font-family:var(--f-mono);font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;color:var(--latte);margin-bottom:20px}
.foot-col ul li{margin-bottom:12px}
.foot-col ul a{color:var(--cream-200);font-size:.94rem}
.foot-col ul a:hover{color:var(--pink-300);padding-left:6px}
.foot-news p{color:var(--cream-300);font-size:.92rem;margin-bottom:16px}
.foot-news form{display:flex;gap:8px;background:rgba(252,248,241,.07);border:1px solid rgba(231,210,180,.2);border-radius:30px;padding:6px}
.foot-news input{flex:1;background:none;border:0;padding:10px 16px;color:var(--cream-50);outline:none;font-size:.9rem}
.foot-news input::placeholder{color:var(--cream-300)}
.foot-news button{background:var(--pink-400);color:#fff;border-radius:30px;padding:10px 18px;font-family:var(--f-mono);font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;font-weight:700;transition:background .3s var(--ease)}
.foot-news button:hover{background:var(--pink-500)}
.foot-bottom{border-top:1px solid rgba(231,210,180,.16);padding:22px 0;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:.84rem;color:var(--cream-300)}
.foot-bottom a:hover{color:var(--pink-300)}
.foot-links{display:flex;gap:20px;flex-wrap:wrap}

/* ---------- 9. 滚动渐入动画 ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}
.reveal.d2{transition-delay:.16s}
.reveal.d3{transition-delay:.24s}
.reveal.d4{transition-delay:.32s}
.reveal.d5{transition-delay:.4s}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}

/* ---------- 10. 响应式 ---------- */
@media (max-width:1024px){
  .g-4{grid-template-columns:repeat(2,1fr)}
  .asym-7-5,.asym-5-7,.asym-8-4,.asym-4-8{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:38px}
}
@media (max-width:860px){
  .nav-links,.nav-cta .btn-nav{display:none}
  .burger{display:flex}
  .g-3{grid-template-columns:1fr}
  .g-2{grid-template-columns:1fr}
  .section{padding:62px 0}
  .sec-head{margin-bottom:34px}
  .foot-grid{grid-template-columns:1fr;gap:32px}
}
@media (max-width:520px){
  .wrap,.wrap-narrow,.nav-inner{padding-inline:18px}
  .g-4{grid-template-columns:1fr}
  h1{font-size:2rem}
  .foot-bottom{flex-direction:column;align-items:flex-start}
}