/* ============================================================
   沐雨社区（pro 版）单页官网样式表
   主题：深松绿 + 奶黄（暖亮纸感、Bento 网格、双机拼贴）
   移动优先：375px 起步，640 / 900 / 1100 逐级扩展
   ============================================================ */

:root{
  --pine:#1B463A;
  --pine-deep:#12312A;
  --pine-soft:#2C6353;
  --sage:#E9F0E7;
  --sage-2:#DCE8DB;
  --amber:#F0B84B;
  --amber-deep:#DFA42D;
  --amber-soft:#FFF4D9;
  --ink:#172A24;
  --muted:#54645C;
  --paper:#FFFFFF;
  --bg:#F6F9F4;
  --line:rgba(23,42,36,.14);
  --radius:20px;
  --shadow:0 22px 46px rgba(18,49,42,.16);
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans CJK SC",sans-serif;
  --serif:"Georgia","Times New Roman","Songti SC","Source Han Serif SC",serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--paper);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer}

.container{width:100%;max-width:1120px;margin:0 auto;padding:0 20px}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.skip{position:absolute;left:-999px;top:8px;z-index:200;background:var(--amber);color:var(--pine-deep);padding:10px 16px;border-radius:10px;font-weight:800;text-decoration:none}
.skip:focus{left:8px}

section{scroll-margin-top:76px}

/* ============ 小标 ============ */
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:var(--serif);font-size:12px;font-weight:700;letter-spacing:.18em;color:var(--pine);margin-bottom:12px}
.eyebrow::before{content:"";width:22px;height:3px;background:var(--amber);display:inline-block;border-radius:2px}
.eyebrow-light{color:#F6EFDA}
.eyebrow-light::before{background:var(--amber)}

.sec-head{max-width:600px;margin-bottom:34px}
.sec-title{font-size:clamp(25px,5.2vw,38px);font-weight:800;line-height:1.24;letter-spacing:.01em}
.sec-desc{color:var(--muted);margin-top:10px;font-size:15px}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:800;font-size:16px;padding:13px 30px;border-radius:12px;text-decoration:none;border:0;white-space:nowrap;transition:transform .16s ease,background .16s ease,box-shadow .16s ease,color .16s ease}
.btn-amber{background:var(--amber);color:var(--pine-deep);box-shadow:0 10px 22px rgba(224,164,45,.32)}
.btn-amber:hover{background:var(--amber-deep);transform:translateY(-2px)}
.btn-outline{background:transparent;color:var(--pine);border:1.5px solid rgba(27,70,58,.32)}
.btn-outline:hover{background:var(--sage);border-color:var(--pine)}
.btn-lg{padding:16px 42px;font-size:17px;border-radius:14px}

/* ============ 页头 ============ */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);border-bottom:1px solid var(--line)}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(23,42,36,.09)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand-logo{width:42px;height:42px;border-radius:12px;overflow:hidden;display:inline-flex;align-items:center;justify-content:center;background:#fff;border:1px solid var(--line)}
.brand-logo img{width:100%;height:100%;object-fit:cover}
.brand-name{font-weight:800;font-size:19px;letter-spacing:.02em}

.nav-toggle{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;background:transparent;border:0;border-radius:10px}
.nav-toggle span{display:block;width:24px;height:2px;border-radius:2px;background:var(--pine);transition:transform .2s ease,opacity .2s ease}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.nav-open .nav-toggle span:nth-child(2){opacity:0}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.site-nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;padding:12px 20px 22px;border-bottom:1px solid var(--line);flex-direction:column;gap:4px}
body.nav-open .site-nav{display:flex}
.site-nav a{color:var(--ink);text-decoration:none;font-weight:600;padding:11px 12px;border-radius:10px;font-size:16px}
.site-nav a:hover{background:var(--sage);color:var(--pine)}
.nav-download{text-align:center;background:var(--amber);color:var(--pine-deep) !important;border-radius:10px;margin-top:8px;font-weight:800}
.nav-download:hover{background:var(--amber-deep)}

/* ============ Hero ============ */
.hero{position:relative;background:var(--paper);overflow:hidden}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--line)}
.hero-grid{display:grid;gap:40px;padding-top:52px;padding-bottom:60px}
.hero-title{font-size:clamp(46px,11.5vw,80px);font-weight:800;line-height:1.06;letter-spacing:.02em;color:var(--pine);margin-bottom:16px}
.hero-sub{font-size:16px;color:var(--muted);max-width:460px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:30px}
.hero-meta{display:flex;flex-wrap:wrap;max-width:470px}
.meta-item{padding:0 18px;border-left:1px solid var(--line)}
.meta-item:first-child{padding-left:0;border-left:0}
.meta-item dt{font-family:var(--serif);font-size:19px;font-weight:700;color:var(--pine);line-height:1.2}
.meta-item dd{font-size:12px;color:var(--muted);margin-top:3px;letter-spacing:.04em}

/* 双机拼贴 */
.hero-collage{position:relative;display:flex;align-items:flex-start;justify-content:center;padding-top:8px}
.phone{position:relative;border-radius:28px;padding:7px;background:#fff;border:1px solid rgba(23,42,36,.11);box-shadow:var(--shadow)}
.phone img{width:100%;height:auto;border-radius:21px}
.phone-back{width:47%;max-width:214px;transform:rotate(-5deg) translateY(22px);z-index:1}
.phone-front{width:52%;max-width:238px;margin-left:-9%;transform:rotate(2.5deg);z-index:2}
.note{position:absolute;z-index:3;top:-6px;left:0;background:var(--amber-soft);border:1px solid rgba(224,164,45,.5);color:var(--pine-deep);font-size:12px;font-weight:800;padding:7px 13px;border-radius:8px;transform:rotate(-4deg);box-shadow:0 10px 20px rgba(23,42,36,.12);max-width:78%}

/* ============ 社区玩法 Bento ============ */
.features{background:var(--paper);padding:72px 0}
.bento{display:grid;grid-template-columns:1fr;gap:12px}
.tile{background:var(--sage);border-radius:var(--radius);padding:26px 22px;border:1px solid transparent;transition:transform .18s ease,box-shadow .18s ease}
.tile:hover{transform:translateY(-3px);box-shadow:0 16px 30px rgba(23,42,36,.09)}
.tile-icon{width:44px;height:44px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;background:#fff;color:var(--pine);margin-bottom:14px}
.tile-icon svg{width:23px;height:23px}
.tile h3{font-size:17px;font-weight:800;margin-bottom:6px}
.tile p{font-size:14px;color:var(--muted)}
.t-dark{background:var(--pine);border-color:rgba(255,255,255,.08)}
.t-dark .tile-icon{background:rgba(240,184,75,.16);color:var(--amber)}
.t-dark h3{color:#F7FBF5}
.t-dark p{color:rgba(233,241,231,.78)}

/* ============ 正在热聊 ============ */
.topics{background:var(--bg);padding:72px 0}
.topic-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.topic{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-size:14px;font-weight:700;color:var(--pine)}
.topic em{font-style:normal;font-size:12px;font-weight:700;color:var(--muted);font-variant-numeric:tabular-nums}
.group-strip{display:grid;grid-template-columns:1fr;gap:10px}
.gs-item{display:flex;align-items:center;justify-content:space-between;gap:12px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:13px 16px}
.gs-name{font-weight:800;font-size:14.5px}
.gs-meta{font-size:12px;font-weight:700;color:var(--pine-soft);white-space:nowrap;font-variant-numeric:tabular-nums}

/* ============ 界面预览 ============ */
.preview{background:var(--paper);padding:72px 0}
.shot-grid{display:grid;grid-template-columns:1fr;gap:30px;justify-items:center}
.shot-item{text-align:center}
.shot-item .phone{width:min(236px,66vw)}
.shot-item figcaption{font-size:13px;font-weight:800;color:var(--pine);margin-top:14px;letter-spacing:.06em}

/* ============ 用户说 ============ */
.reviews{background:var(--sage);padding:72px 0}
.review-grid{display:grid;grid-template-columns:1fr;gap:14px}
.review-feature{background:var(--pine);border-radius:var(--radius);padding:28px 24px;color:#F7FBF5}
.quote{font-family:var(--serif);font-size:clamp(19px,3.8vw,26px);line-height:1.5;letter-spacing:.01em}
.review-feature footer{margin-top:18px;font-size:13px;font-weight:700;color:var(--amber)}
.review-card{background:#fff;border:1px solid rgba(23,42,36,.1);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;gap:12px}
.stars svg{display:block}
.review-card p{font-size:14.5px;flex:1}
.review-card footer{font-size:12.5px;font-weight:700;color:var(--muted)}

/* ============ 常见问题 ============ */
.faq{background:var(--paper);padding:72px 0}
.faq-grid{display:grid;gap:20px}
.faq-list{display:flex;flex-direction:column;gap:10px}
.faq-item{background:var(--bg);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;padding:16px 18px;font-weight:800;font-size:15px;display:flex;align-items:center;justify-content:space-between;gap:14px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-family:var(--serif);font-size:19px;color:var(--pine);transition:transform .2s ease}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 18px 16px;color:var(--muted);font-size:14px;max-width:620px}

/* ============ 下载 CTA ============ */
.cta{position:relative;overflow:hidden;background:linear-gradient(150deg,var(--pine-deep),var(--pine) 62%,#2C6353);padding:80px 0;color:#fff;text-align:center}
.cta::before{content:"";position:absolute;width:340px;height:340px;right:-110px;top:-130px;border-radius:50%;background:radial-gradient(circle,rgba(240,184,75,.24),rgba(240,184,75,0) 70%)}
.cta::after{content:"";position:absolute;width:280px;height:280px;left:-90px;bottom:-120px;border-radius:50%;background:radial-gradient(circle,rgba(220,232,219,.16),rgba(220,232,219,0) 72%)}
.cta-inner{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;gap:16px}
.cta-title{font-size:clamp(26px,5.9vw,42px);font-weight:800;line-height:1.22;letter-spacing:.01em}
.cta-desc{font-size:15px;color:rgba(255,255,255,.86);max-width:500px}
.cta-chips{display:flex;flex-wrap:wrap;justify-content:center;gap:9px;margin-top:6px}
.cta-chips li{border:1px solid rgba(255,255,255,.38);background:rgba(255,255,255,.08);padding:6px 15px;border-radius:999px;font-size:12.5px;font-weight:600;color:#F4F9EF}

/* ============ 页脚 ============ */
.site-footer{background:#0F2620;color:rgba(255,255,255,.74);padding:32px 0}
.footer-inner{display:flex;flex-direction:column;align-items:center;gap:9px;text-align:center}
.site-footer .brand{color:#fff}
.site-footer .brand-logo{width:36px;height:36px;border-radius:10px;border-color:rgba(255,255,255,.18)}
.site-footer .brand-name{font-size:15px}
.footer-slogan{font-size:12.5px;color:rgba(255,255,255,.58);letter-spacing:.14em}
.footer-copy{font-size:12px;color:rgba(255,255,255,.42)}

/* ============ 焦点可见 ============ */
:focus-visible{outline:2px solid var(--amber-deep);outline-offset:3px}

/* ============ 动效偏好 ============ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none !important;animation:none !important}
}

/* ============ 响应式：640px ============ */
@media (min-width:640px){
  .bento{grid-template-columns:repeat(2,1fr);gap:14px}
  .t-wide{grid-column:span 2}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .review-feature{grid-column:span 2}
  .shot-grid{grid-template-columns:repeat(3,1fr)}
  .group-strip{grid-template-columns:repeat(2,1fr)}
}

/* ============ 响应式：900px ============ */
@media (min-width:900px){
  .nav-toggle{display:none}
  .site-nav{display:flex;position:static;background:transparent;border:0;padding:0;flex-direction:row;align-items:center;gap:4px}
  .site-nav a{padding:9px 13px;font-size:14.5px;border-radius:8px}
  .nav-download{margin-top:0;padding:10px 22px}
  .hero-grid{grid-template-columns:1.02fr .98fr;align-items:center;gap:26px;padding-top:74px;padding-bottom:86px}
  .bento{grid-template-columns:repeat(4,1fr)}
  .group-strip{grid-template-columns:repeat(4,1fr)}
  .shot-item:nth-child(2){margin-top:26px}
  .shot-item:nth-child(3){margin-top:6px}
  .faq-grid{grid-template-columns:.85fr 1.15fr;gap:44px;align-items:start}
  section{scroll-margin-top:84px}
}

/* ============ 响应式：1100px ============ */
@media (min-width:1100px){
  .container{padding:0 32px}
  .hero-sub{font-size:17.5px}
}