/* m3b2b.com 首页 / 条款 / 隐私 共用（2026-10-24 v2：跟 pitch v4 同一套 —— 金色浮空城市 + 左对齐大标题 + 图标芯片） */
:root{--bg:#0E1014;--panel:#161A21;--edge:#2A303C;--txt:#F2F3F5;--body:#C4CAD3;--dim:#8D95A3;--gold:#FFD426;--gold-d:#C9A100;--ok:#4CBF88}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--txt);font:16px/1.65 'Inter','Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif}
a{color:var(--gold);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
.num{font-family:'Montserrat','Inter',sans-serif}

/* 语言：两种文字都在 HTML 里（扫描器两种都读得到），按 html[lang] 只显示一种 */
html[lang^=zh] [data-l=en],html[lang=en] [data-l=zh]{display:none!important}

/* 顶栏 */
.top{position:sticky;top:0;z-index:20;border-top:4px solid var(--gold);background:rgba(14,16,20,.82);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid rgba(42,48,60,.6)}
.top .wrap{display:flex;align-items:center;gap:10px;height:64px}
.top .logo{display:flex;align-items:center}
.top .logo img{height:30px;width:auto;display:block}
.top .sp{flex:1}
.top nav{display:flex;gap:22px;margin-right:10px}
.top nav a{color:var(--body);font-size:14px;font-weight:600}
.top nav a:hover{color:var(--gold);text-decoration:none}
@media (max-width:820px){.top nav{display:none}}
.lang-btn{border:1px solid var(--edge);background:transparent;color:var(--body);font:600 13px/1 inherit;padding:9px 12px;border-radius:999px;cursor:pointer;min-height:36px}
.lang-btn:hover{border-color:var(--gold);color:var(--gold)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 22px;border-radius:999px;font-weight:800;font-size:15px;white-space:nowrap}
.btn:hover{text-decoration:none}
.btn-gold{background:var(--gold);color:#111;box-shadow:0 8px 24px rgba(255,212,38,.18)}
.btn-line{border:1px solid #5A6273;color:var(--txt);background:rgba(14,16,20,.4)}
.btn-line:hover{border-color:var(--gold);color:var(--gold)}
.top .btn{min-height:38px;padding:0 16px;font-size:14px;box-shadow:none}

/* 首屏：右侧出血的浮空城市 + 左侧压字 */
.hero{position:relative;overflow:hidden;min-height:min(86vh,760px);display:flex;align-items:center}
.hero .bgimg{position:absolute;right:0;top:0;width:68%;height:100%;object-fit:cover;object-position:75% center;z-index:0}
.hero .scrim{position:absolute;inset:0;z-index:1;
  background:linear-gradient(90deg,var(--bg) 0%,var(--bg) 32%,rgba(14,16,20,.82) 46%,rgba(14,16,20,.25) 70%,rgba(14,16,20,0) 100%),
             linear-gradient(180deg,rgba(14,16,20,.55) 0%,transparent 22%,transparent 72%,var(--bg) 100%)}
.hero .wrap{position:relative;z-index:2;width:100%;padding-top:56px;padding-bottom:64px}
.hero .copy{max-width:560px}
.kicker{font:800 12px/1.2 'Montserrat',sans-serif;letter-spacing:.2em;color:var(--gold);text-transform:uppercase;margin-bottom:18px}
.hero h1{font-size:clamp(38px,6vw,68px);line-height:1.08;margin:0 0 18px;font-weight:900;letter-spacing:-.01em}
.hero h1 em{font-style:normal;color:var(--gold);text-shadow:0 0 40px rgba(255,212,38,.25)}
.hero p.lead{font-size:clamp(16px,1.9vw,19px);color:var(--body);margin:0 0 28px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:36px;max-width:560px}
.fact{border:1px solid rgba(255,212,38,.28);background:rgba(22,26,33,.72);border-radius:14px;padding:12px 14px}
.fact b{display:block;font:800 22px/1.15 'Montserrat','Inter',sans-serif;color:var(--gold)}
.fact b small{font-size:13px;color:var(--txt);margin-left:4px}
.fact span{display:block;font-size:13px;color:var(--body);margin-top:4px;line-height:1.4}
@media (max-width:760px){
  .hero{min-height:0;display:block}
  .hero .bgimg{position:relative;width:100%;height:auto;aspect-ratio:1/1;object-position:84% center}
  .hero .scrim{background:linear-gradient(180deg,rgba(14,16,20,.35) 0%,rgba(14,16,20,0) 18%,rgba(14,16,20,0) 30%,var(--bg) 46%)}
  .hero .wrap{margin-top:-120px;padding-top:0;padding-bottom:44px}
  .kicker{font-size:11px;letter-spacing:.14em}
  .facts{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
  .fact{padding:10px}
  .fact b{font-size:18px}
}

/* 区块 */
section.blk{position:relative;padding:72px 0;border-top:1px solid rgba(42,48,60,.5)}
.sec-n{font:900 46px/1 'Montserrat',sans-serif;color:var(--gold);letter-spacing:-.02em;margin-bottom:10px}
.lk{display:flex;align-items:baseline;gap:6px 18px;flex-wrap:wrap;margin-bottom:8px}
h2{font-size:clamp(26px,3.8vw,38px);line-height:1.2;margin:0;font-weight:900}
h2 em{font-style:normal;color:var(--gold)}
.lk .side{font-size:16px;font-weight:700;color:var(--body)}
.sub{color:var(--body);margin:6px 0 30px;max-width:720px}
.grid{display:grid;gap:14px}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
@media (max-width:960px){.g4{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:1fr}}
@media (max-width:560px){.g4,.g2{grid-template-columns:1fr}}
.card{background:linear-gradient(180deg,#1A1E26,#13161C);border:1px solid var(--edge);border-radius:18px;padding:22px;box-shadow:inset 0 1px 0 rgba(255,212,38,.08)}
.card.on{border-color:rgba(255,212,38,.5);background:linear-gradient(180deg,#2A2512,#16181D)}
.card h3{margin:0 0 6px;font-size:18px;font-weight:800}
.card p{margin:0;color:var(--body);font-size:15px}
.card .tag{font-size:12px;font-weight:800;color:var(--gold);letter-spacing:.04em;margin-bottom:4px}

/* 图标芯片 */
.ic{width:46px;height:46px;border-radius:12px;flex:none;border:1.5px solid rgba(255,212,38,.42);background:rgba(255,212,38,.07);
  display:flex;align-items:center;justify-content:center;color:var(--gold);margin-bottom:16px}
.ic svg{width:22px;height:22px;stroke:currentColor;stroke-width:1.9;fill:none;stroke-linecap:round;stroke-linejoin:round}
.irow{display:flex;gap:14px;align-items:flex-start}
.irow .ic{margin:0;width:40px;height:40px}
.irow .ic svg{width:19px;height:19px}

/* 三步 */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;counter-reset:s}
@media (max-width:900px){.steps{grid-template-columns:1fr}}
.steps .card{position:relative;padding-top:26px}
.steps .n{font:900 40px/1 'Montserrat',sans-serif;color:rgba(255,212,38,.9);margin-bottom:14px}
.steps a.more{display:inline-block;margin-top:12px;font-size:14px;font-weight:700}

/* M3 积分 + App 截图 */
.m3{display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center}
@media (max-width:900px){.m3{grid-template-columns:1fr}}
.m3 .list{display:flex;flex-direction:column;gap:12px;margin:22px 0}
.m3 .list .card{padding:16px 18px}
.m3 .list h3{font-size:16px;margin:0 0 2px}
.m3 .list p{font-size:14px}
.phones{display:flex;gap:14px;justify-content:center}
.phones img{width:min(46%,230px);height:auto;border-radius:26px;border:1.5px solid #3A404C;box-shadow:0 24px 60px rgba(0,0,0,.55);display:block}
.phones img:nth-child(2){margin-top:44px}
.pts{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;margin-top:6px}
.pts b{font:900 54px/1 'Montserrat',sans-serif;color:var(--gold)}
.pts span{font-weight:700;color:var(--txt)}

/* 安全 */
.safe ul{padding-left:20px;margin:6px 0 0}
.safe li{margin:0 0 8px;color:var(--body)}
.safe li b{color:var(--txt)}

/* FAQ */
.faq{max-width:860px}
.faq details{border:1px solid var(--edge);border-radius:14px;background:#14171D;margin-bottom:10px}
.faq summary{list-style:none;cursor:pointer;padding:16px 18px;font-weight:800;display:flex;gap:12px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';margin-left:auto;color:var(--gold);font:800 20px/1 'Montserrat',sans-serif}
.faq details[open] summary::after{content:'–'}
.faq details[open]{border-color:rgba(255,212,38,.35)}
.faq .a{padding:0 18px 16px;color:var(--body)}

/* 收尾横幅 */
.endband{position:relative;overflow:hidden;padding:110px 0;text-align:center;border-top:1px solid rgba(42,48,60,.5)}
.endband img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 60%;z-index:0}
.endband::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,var(--bg) 0%,rgba(14,16,20,.35) 40%,rgba(14,16,20,.55) 100%);z-index:1}
.endband .wrap{position:relative;z-index:2}
.endband h2{margin-bottom:12px}
.endband p{color:var(--body);margin:0 0 26px}
.endband .cta{justify-content:center}

.note{font-size:13px;color:var(--dim);margin-top:18px}

/* 页脚 */
footer{border-top:1px solid var(--edge);padding:36px 0 44px;color:var(--dim);font-size:14px}
footer .row{display:flex;gap:16px 26px;flex-wrap:wrap;align-items:center}
footer .row a{color:var(--body)}
footer .row a:hover{color:var(--gold)}
footer img{height:26px;width:auto;display:block;margin-bottom:16px}
footer .fine{margin-top:16px;line-height:1.6}

/* 条款 / 隐私正文 */
.doc{max-width:780px;margin:0 auto;padding:40px 20px 64px}
.doc h1{font-size:clamp(28px,4.4vw,38px);margin:0 0 6px;font-weight:900}
.doc .meta{color:var(--dim);font-size:14px;margin-bottom:28px}
.doc h2{font-size:20px;margin:34px 0 10px}
.doc p,.doc li{color:var(--body)}
.doc ul{padding-left:22px}
.doc li{margin-bottom:6px}
.doc table{width:100%;border-collapse:collapse;font-size:14px;margin:10px 0}
.doc th,.doc td{border:1px solid var(--edge);padding:9px 10px;text-align:left;vertical-align:top;color:var(--body)}
.doc th{color:var(--txt);background:#161A21}