/* CSSBuy Spreadsheet - cssbuyfind.com
   设计令牌实测自 www.cssbuy.com (2026-09-03)，见 _planning/04-design-dna.md */

:root{
  --green:#6CBC2A;        /* 官网品牌绿：eyebrow / 强调数字 / 按钮描边 */
  --green-deep:#387C00;   /* 官网 Categories 入口 */
  --green-soft:#F2FAEC;
  --ink:#262626;          /* 官网主文字 / 主按钮底 */
  --ink-2:#60646C;        /* 官网次要文字 */
  --ink-3:#8A8F98;
  --line:#E6E8EA;
  --bg:#FFFFFF;
  --bg-alt:#F8F8F8;       /* 官网区块底 */
  --radius-card:20px;
  --radius-pill:999px;
  --maxw:1180px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  font-size:17px;line-height:1.68;-webkit-font-smoothing:antialiased;
  overflow-x:clip;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--green-deep);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.24;margin:0 0 .5em;font-weight:700;letter-spacing:-.015em}
h1{font-size:clamp(2rem,4.4vw,3rem)}
h2{font-size:clamp(1.5rem,2.9vw,2.05rem)}
h3{font-size:clamp(1.15rem,1.9vw,1.34rem)}
p{margin:0 0 1.05em}
ul,ol{margin:0 0 1.15em;padding-left:1.35em}
li{margin-bottom:.45em}
strong{font-weight:650}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.section{padding:66px 0}
.section--alt{background:var(--bg-alt)}
.section--tight{padding:46px 0}
.lede{font-size:1.1rem;color:var(--ink-2);max-width:66ch}

/* eyebrow：官网用绿色小标题 */
.eyebrow{
  display:inline-block;font-size:.775rem;font-weight:700;letter-spacing:.1em;
  text-transform:uppercase;color:var(--green);margin:0 0 .6em;
}

/* ---------- 按钮：官网胶囊形 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  min-height:46px;padding:.7em 1.5em;border-radius:var(--radius-pill);
  font-weight:600;font-size:.97rem;text-decoration:none;
  border:1.5px solid transparent;cursor:pointer;transition:background .18s,color .18s,border-color .18s;
}
.btn:hover{text-decoration:none}
.btn--primary{background:var(--ink);color:#fff}
.btn--primary:hover{background:#000}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--green)}
.btn--ghost:hover{background:var(--green-soft)}
.btn--green{background:var(--green);color:#fff}
.btn--green:hover{background:var(--green-deep)}

/* ---------- 页眉 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);
  backdrop-filter:blur(9px);border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;min-height:66px}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;color:var(--ink);font-size:1.06rem;letter-spacing:-.02em;min-height:44px}
.brand:hover{text-decoration:none}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:30px;border-radius:8px;background:var(--green);
  color:#fff;font-size:.82rem;font-weight:800;letter-spacing:.02em;flex:none;
}
.brand-text{white-space:nowrap}
.brand-text i{font-style:normal;color:var(--ink-2);font-weight:600}

.nav{margin-left:auto;display:flex;align-items:center;gap:4px}
.nav a{
  display:inline-flex;align-items:center;min-height:44px;padding:0 13px;
  color:var(--ink);font-weight:550;font-size:.95rem;border-radius:10px;
}
.nav a:hover{background:var(--bg-alt);text-decoration:none}
.nav a[aria-current="page"]{color:var(--green-deep);font-weight:700}
.nav-cta{margin-left:8px}

.nav-toggle{
  display:none;margin-left:auto;width:46px;height:46px;border:1px solid var(--line);
  background:#fff;border-radius:11px;cursor:pointer;align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:19px;height:2px;background:var(--ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:19px;height:2px;background:var(--ink)}
.nav-toggle span::before{top:-6px}.nav-toggle span::after{top:6px}

@media (max-width:920px){
  .nav-toggle{display:inline-flex}
  .nav{
    position:absolute;top:66px;left:0;right:0;flex-direction:column;align-items:stretch;
    background:#fff;border-bottom:1px solid var(--line);padding:10px 16px 18px;gap:2px;
    box-shadow:0 14px 30px rgba(0,0,0,.08);
    visibility:hidden;opacity:0;transform:translateY(-8px);pointer-events:none;transition:.18s;
  }
  .nav[data-open="true"]{visibility:visible;opacity:1;transform:none;pointer-events:auto}
  .nav a{min-height:48px;padding:0 12px}
  .nav-cta{margin:8px 0 0}
}

/* ---------- hero：深色，对齐 CSSBuy 官网首屏 ----------
   背景图 = 官网 first_bac2.webp（深绿 → 黑渐变） */
.hero{
  position:relative;padding:72px 0 66px;color:#fff;
  background:#04140A url('/assets/img/hero-bg.webp') center/cover no-repeat;
  isolation:isolate;
}
.hero::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(100deg,rgba(4,20,10,.86) 0%,rgba(4,20,10,.45) 55%,rgba(4,20,10,.75) 100%);
}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:46px;align-items:center}
.hero-grid > *{min-width:0}   /* 防止视频容器把左栏挤扁 */
.hero h1{margin-bottom:.42em;color:#fff}
.hero .eyebrow{color:var(--green)}
.hero .lede{color:rgba(255,255,255,.82);max-width:60ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero .btn--ghost{color:#fff;border-color:rgba(255,255,255,.5)}
.hero .btn--ghost:hover{background:rgba(255,255,255,.12)}

/* 视频容器：底色先铺深色，视频未就绪时不会白闪（headless 抽不出 poster 帧） */
.hero-video{
  position:relative;border-radius:var(--radius-card);overflow:hidden;
  border:1px solid rgba(108,188,42,.32);
  background:#04140A linear-gradient(135deg,#0B2A14 0%,#04140A 70%);
  box-shadow:0 22px 54px rgba(0,0,0,.45);
  aspect-ratio:1212/682;
}
.hero-video video{width:100%;height:100%;display:block;object-fit:cover}
.hero-note{margin-top:12px;font-size:.83rem;color:rgba(255,255,255,.6)}

/* hero 搜索框：直连 W2CSpreadsheet 的 /search?q= */
.hero-search{display:flex;gap:10px;margin-top:26px;max-width:560px}
.hero-search input[type="search"]{
  flex:1;min-width:0;min-height:52px;padding:0 18px;font:inherit;font-size:1rem;
  border:1.5px solid rgba(255,255,255,.28);border-radius:var(--radius-pill);
  background:rgba(255,255,255,.1);color:#fff;
}
.hero-search input[type="search"]::placeholder{color:rgba(255,255,255,.55)}
.hero-search input[type="search"]:focus{
  outline:none;border-color:var(--green);background:rgba(255,255,255,.16);
}
.hero-search button{min-height:52px;padding:0 26px;flex:none}
.hero-search-note{margin-top:10px;font-size:.82rem;color:rgba(255,255,255,.58)}
@media (max-width:520px){
  .hero-search{flex-direction:column}
  .hero-search button{width:100%}
}

/* hero 里的信任小条 */
.hero-strip{
  display:grid;grid-template-columns:repeat(3,1fr);gap:18px 26px;margin-top:32px;
  padding-top:22px;border-top:1px solid rgba(255,255,255,.16);
}
.hero-strip div{font-size:.85rem;line-height:1.5;color:rgba(255,255,255,.72)}
.hero-strip b{display:block;color:#fff;font-size:.99rem;font-weight:700;margin-bottom:3px}
@media (max-width:860px){.hero-strip{grid-template-columns:1fr;gap:14px}}

@media (max-width:860px){
  .hero-grid{grid-template-columns:1fr;gap:28px}
  .hero{padding:44px 0 42px}
}

/* 深色地球条：官网 world.webp */
.world-band{
  position:relative;background:#04140A url('/assets/img/world-map.webp') center/cover no-repeat;
  color:#fff;padding:58px 0;isolation:isolate;
}
.world-band::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(90deg,rgba(4,20,10,.9) 0%,rgba(4,20,10,.55) 100%);
}
.world-band h2{color:#fff}
.world-band p{color:rgba(255,255,255,.8)}
.world-band .eyebrow{color:var(--green)}

/* ---------- 图文并排交替（硬门 7） ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center;margin:0 0 62px}
.split:last-child{margin-bottom:0}
.split--flip .split-media{order:-1}
.split-media{border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);background:#fff}
.split-media img{width:100%}
.split-body h2,.split-body h3{margin-top:0}
@media (max-width:860px){
  .split{grid-template-columns:1fr;gap:24px;margin-bottom:44px}
  .split--flip .split-media{order:0}
}

/* 图注（硬门 10：自带金额的截图须注明是示例值） */
figure{margin:0}
figcaption{
  font-size:.845rem;color:var(--ink-2);padding:11px 15px;
  background:var(--bg-alt);border-top:1px solid var(--line);
}

/* ---------- signature：步骤轨 ---------- */
.rail{display:grid;gap:30px;counter-reset:railstep}
.rail-item{
  display:grid;grid-template-columns:56px 1fr 1fr;gap:26px;align-items:start;
  padding-bottom:30px;border-bottom:1px solid var(--line);
}
.rail-item:last-child{border-bottom:0;padding-bottom:0}
.rail-num{
  counter-increment:railstep;width:44px;height:44px;border-radius:50%;
  border:2px solid var(--green);color:var(--green-deep);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1rem;
}
.rail-num::before{content:counter(railstep)}
.rail-body h3{margin-bottom:.35em}
.rail-body p:last-child{margin-bottom:0}
.rail-media{border-radius:14px;overflow:hidden;border:1px solid var(--line);background:#fff}
.rail-media-stack{display:grid;gap:14px}
.rail-media-stack .rail-media{margin:0}
@media (max-width:900px){
  .rail-item{grid-template-columns:44px 1fr;gap:16px}
  .rail-media{grid-column:1 / -1;margin-top:6px}
}

/* ---------- 类目网格 ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media (max-width:1000px){.cat-grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:720px){.cat-grid{grid-template-columns:repeat(2,1fr);gap:14px}}
.cat-card{
  display:block;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;background:#fff;color:var(--ink);transition:border-color .18s,transform .18s,box-shadow .18s;
}
.cat-card:hover{
  text-decoration:none;border-color:var(--green);transform:translateY(-3px);
  box-shadow:0 12px 26px rgba(38,38,38,.09);
}
.cat-card img{width:100%;aspect-ratio:1/1;object-fit:cover;background:var(--bg-alt)}
.cat-card-body{padding:14px 16px 17px}
.cat-card-name{font-weight:700;font-size:1.01rem;margin-bottom:2px}
.cat-card-note{font-size:.855rem;color:var(--ink-2);line-height:1.5}
.cat-card-go{display:inline-flex;align-items:center;gap:5px;margin-top:9px;font-size:.855rem;font-weight:650;color:var(--green-deep)}

/* ---------- 通用卡片组 ---------- */
.cards{display:grid;gap:20px;grid-template-columns:repeat(2,1fr)}
.cards--4{grid-template-columns:repeat(4,1fr)}
@media (max-width:1000px){.cards--4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:680px){.cards,.cards--4{grid-template-columns:1fr}}
.card{
  border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px 24px 26px;background:#fff;
}
.card--alt{background:var(--bg-alt);border-color:transparent}
.card h3{margin-top:0}
.card p:last-child,.card ul:last-child{margin-bottom:0}
/* 触点 >=44px（硬门 16）：正文里的行动链接也要够手指点 */
.card-link{
  display:inline-flex;align-items:center;gap:6px;font-weight:650;font-size:.93rem;
  min-height:44px;padding:2px 0;
}

/* ---------- 事实条 ---------- */
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media (max-width:860px){.facts{grid-template-columns:repeat(2,1fr)}}
.fact{padding:20px 20px 22px;background:#fff;border:1px solid var(--line);border-radius:16px}
.fact-k{font-size:.79rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--green);margin-bottom:6px}
.fact-v{font-weight:700;font-size:1.03rem;margin-bottom:4px}
.fact-n{font-size:.87rem;color:var(--ink-2);line-height:1.55;margin:0}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  cursor:pointer;padding:19px 44px 19px 2px;font-weight:650;position:relative;
  list-style:none;min-height:44px;display:flex;align-items:center;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";position:absolute;right:10px;top:50%;width:9px;height:9px;
  border-right:2px solid var(--green);border-bottom:2px solid var(--green);
  transform:translateY(-70%) rotate(45deg);transition:transform .2s;
}
.faq details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq .faq-a{padding:0 6px 20px 2px;color:var(--ink-2)}
.faq .faq-a p:last-child{margin-bottom:0}

/* ---------- 提示块 ---------- */
.note{
  border-left:3px solid var(--green);background:var(--green-soft);
  padding:17px 20px;border-radius:0 14px 14px 0;margin:0 0 22px;
}
.note p:last-child{margin-bottom:0}
.note--warn{border-left-color:#D9822B;background:#FDF5EC}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-card)}
table{border-collapse:collapse;width:100%;min-width:520px;font-size:.94rem}
th,td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--bg-alt);font-weight:700;font-size:.85rem;letter-spacing:.03em;text-transform:uppercase;color:var(--ink-2)}
tr:last-child td{border-bottom:0}

/* ---------- 面包屑 ---------- */
.crumb{font-size:.87rem;color:var(--ink-2);padding:18px 0 0}
.crumb a{color:var(--ink-2)}
.crumb span{margin:0 7px;color:var(--ink-3)}

/* ---------- 页内目录 ---------- */
.toc{border:1px solid var(--line);border-radius:var(--radius-card);padding:20px 24px;background:var(--bg-alt);margin:0 0 40px}
.toc h2{font-size:.83rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-2);margin-bottom:.7em}
.toc ol{margin:0;padding-left:1.25em;columns:2;column-gap:32px}
.toc li{margin-bottom:.35em}
@media (max-width:680px){.toc ol{columns:1}}

/* ---------- 更新列表 ---------- */
.posts{display:grid;gap:18px}
.post{border:1px solid var(--line);border-radius:var(--radius-card);padding:22px 24px;background:#fff}
.post-meta{font-size:.82rem;color:var(--ink-2);margin-bottom:7px;display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.post-tag{background:var(--green-soft);color:var(--green-deep);font-weight:650;padding:3px 10px;border-radius:var(--radius-pill);font-size:.76rem}
.post h3{margin-bottom:.4em}
.post p:last-child{margin-bottom:0}

/* ---------- CTA 区 ---------- */
.cta-band{background:var(--ink);color:#fff;border-radius:var(--radius-card);padding:42px 44px}
.cta-band h2{color:#fff;margin-bottom:.4em}
.cta-band p{color:rgba(255,255,255,.78);max-width:60ch}
.cta-band .btn--ghost{color:#fff;border-color:rgba(255,255,255,.45)}
.cta-band .btn--ghost:hover{background:rgba(255,255,255,.1)}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
@media (max-width:680px){.cta-band{padding:30px 24px}}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-alt);border-top:1px solid var(--line);padding:52px 0 30px;margin-top:76px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px}
@media (max-width:860px){.footer-grid{grid-template-columns:1fr 1fr;gap:28px}}
@media (max-width:520px){.footer-grid{grid-template-columns:1fr}}
.footer-grid h4{font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-2);margin-bottom:.9em}
.footer-grid ul{list-style:none;padding:0;margin:0}
.footer-grid li{margin-bottom:.2em}
.footer-grid a{
  color:var(--ink);font-size:.93rem;
  display:inline-flex;align-items:center;min-height:44px;  /* 硬门 16 触点 */
}
.footer-about p{font-size:.9rem;color:var(--ink-2);max-width:38ch}
.footer-bottom{
  margin-top:36px;padding-top:22px;border-top:1px solid var(--line);
  font-size:.85rem;color:var(--ink-2);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
}
.footer-bottom a{color:var(--ink-2)}

.disclosure{font-size:.85rem;color:var(--ink-2);background:#fff;border:1px solid var(--line);border-radius:14px;padding:15px 18px;margin-top:24px}
.disclosure p:last-child{margin-bottom:0}

/* ---------- 无障碍 ---------- */
.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:12px 18px;border-radius:0 0 10px 0;z-index:100}
.skip:focus{left:0}
:focus-visible{outline:3px solid var(--green);outline-offset:2px;border-radius:4px}
.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}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}