/* ============================================================
   邦大家PDF超能助手 — 功能详情页共享样式(SEO 落地页)
   被 remove-watermark.html 等功能详情页复用
   ============================================================ */
:root{
  --bg:#FFFFFF; --bg-soft:#F6F8FC; --ink:#0E1116; --muted:#525B6B; --faint:#828B9A;
  --line:#EBEFF5; --line-2:#F1F4F9; --line-strong:#DEE4ED;
  --accent:#006FEE; --accent-2:#3B9BFF; --accent-soft:#EAF2FE; --accent-ghost:#F3F8FE;
  --ok:#12A150;
  --dark:#0C0F15; --on-dark:#E7EBF2; --on-dark-faint:#959DAC; --border-dark:rgba(255,255,255,.09);
  --r-s:8px; --r-m:12px; --r-l:16px; --r-xl:22px;
  --shadow-soft:0 1px 2px rgba(16,38,76,.04),0 10px 30px -16px rgba(16,38,76,.10);
  --shadow-float:0 40px 90px -34px rgba(0,58,150,.26),0 16px 40px -24px rgba(16,38,76,.12);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.78;font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1000px;margin:0 auto;padding:0 28px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:650;border-radius:11px;border:1px solid transparent;cursor:pointer;font-family:inherit;white-space:nowrap;transition:transform .12s,background .16s,box-shadow .16s,border-color .16s}
.btn:active{transform:translateY(1px)}
.btn svg{width:18px;height:18px}
.btn-pri{background:linear-gradient(180deg,#1380FF,#006FEE);color:#fff;box-shadow:0 12px 26px -12px rgba(0,111,238,.6),inset 0 1px 0 rgba(255,255,255,.22)}
.btn-pri:hover{background:linear-gradient(180deg,#2B8FFF,#0A78F4);text-decoration:none}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:#c2cee0;background:#fbfcfe;text-decoration:none}
.btn-lg{height:52px;padding:0 26px;font-size:16px}
.btn-sm{height:39px;padding:0 18px;font-size:14px}

/* 顶栏 */
.fp-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.82);backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line)}
.fp-nav{display:flex;align-items:center;height:64px;gap:14px;max-width:1100px;margin:0 auto;padding:0 28px}
.brand{display:flex;align-items:center;gap:10px;font-size:16.5px;font-weight:750;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand .mark{width:28px;height:28px}
.fp-nav .sp{margin-left:auto}
.fp-nav .lk{font-size:14.5px;font-weight:600;color:var(--muted)}
.fp-nav .lk:hover{color:var(--accent);text-decoration:none}

/* 面包屑 */
.crumb{padding:22px 0 0;font-size:13px;color:var(--faint)}
.crumb a{color:var(--muted)}
.crumb .sep{margin:0 8px;color:#c7cdd8}

/* Hero */
.fp-hero{padding:30px 0 18px;position:relative;overflow:hidden}
.fp-hero::before{content:"";position:absolute;top:-220px;left:-160px;width:680px;height:680px;border-radius:50%;background:radial-gradient(50% 50% at 50% 50%,rgba(0,111,238,.09),transparent 70%);z-index:0;pointer-events:none}
.fp-hero>*{position:relative;z-index:1}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:650;color:var(--accent);background:var(--accent-soft);border:1px solid #DCEAFD;padding:6px 13px;border-radius:999px}
.eyebrow svg{width:15px;height:15px}
.fp-hero h1{font-size:clamp(30px,4.6vw,46px);font-weight:840;letter-spacing:-.03em;line-height:1.12;margin-top:18px;text-wrap:balance}
.fp-hero h1 .hl{color:var(--accent)}
.fp-hero .lead{margin-top:18px;font-size:clamp(16px,1.7vw,18.5px);color:var(--muted);max-width:64ch;line-height:1.72}
.fp-hero .cta{margin-top:26px;display:flex;gap:13px;flex-wrap:wrap}
.fp-hero .kv{margin-top:22px;display:flex;flex-wrap:wrap;gap:9px}
.fp-hero .kv span{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:600;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 13px}
.fp-hero .kv svg{width:14px;height:14px;color:var(--ok)}

/* 通用内容区 */
.fp-sec{padding:clamp(40px,5vw,60px) 0;border-top:1px solid var(--line-2)}
.fp-sec h2{font-size:clamp(23px,2.8vw,31px);font-weight:800;letter-spacing:-.02em;line-height:1.2}
.fp-sec .sub{margin-top:12px;color:var(--muted);font-size:16px;max-width:70ch}
.fp-sec p{color:var(--muted);font-size:16px;margin:14px 0;max-width:74ch}
.fp-sec p b,.fp-sec li b{color:var(--ink);font-weight:680}

/* 要点卡 */
.pts{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:26px}
.pt{border:1px solid var(--line);border-radius:var(--r-l);background:#fff;padding:22px 22px;transition:border-color .15s,box-shadow .15s,transform .15s}
.pt:hover{border-color:#dbe6f4;box-shadow:var(--shadow-soft);transform:translateY(-2px)}
.pt .ic{width:42px;height:42px;border-radius:11px;background:linear-gradient(135deg,#EAF2FE,#DCEAFD);color:var(--accent);display:flex;align-items:center;justify-content:center}
.pt .ic svg{width:22px;height:22px}
.pt h3{margin-top:14px;font-size:17px;font-weight:720;letter-spacing:-.01em}
.pt p{margin-top:7px;font-size:14px;color:var(--muted);line-height:1.66;max-width:none}

/* 步骤 */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:26px}
.step{position:relative;border:1px solid var(--line);border-radius:var(--r-l);background:#fff;padding:26px 24px}
.step .n{font-size:14px;font-weight:750;color:var(--accent);background:var(--accent-ghost);width:34px;height:34px;border-radius:50%;display:grid;place-items:center}
.step h3{margin-top:14px;font-size:17px;font-weight:720}
.step p{margin-top:6px;font-size:14px;color:var(--muted);max-width:none}

/* 适用场景列表 */
.uses{list-style:none;margin-top:22px;display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.uses li{display:flex;gap:11px;align-items:flex-start;font-size:15px;color:var(--muted);background:var(--bg-soft);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.uses li svg{width:18px;height:18px;color:var(--accent);flex:none;margin-top:3px}
.uses li b{color:var(--ink);font-weight:680}

/* FAQ */
.qa{border:1px solid var(--line);border-radius:var(--r-m);background:#fff;margin-top:12px;overflow:hidden;transition:border-color .15s,box-shadow .15s}
.qa[open]{border-color:#d4e2f4;box-shadow:var(--shadow-soft)}
.qa summary{list-style:none;cursor:pointer;padding:18px 22px;display:flex;align-items:center;gap:14px;font-size:16px;font-weight:680}
.qa summary::-webkit-details-marker{display:none}
.qa summary .pl{margin-left:auto;width:20px;height:20px;flex:none;color:var(--accent);transition:transform .2s}
.qa[open] summary .pl{transform:rotate(45deg)}
.qa .ans{padding:0 22px 20px;color:var(--muted);font-size:15px;line-height:1.76;max-width:74ch}

/* 相关功能 */
.rel{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:24px}
.rel a{display:block;border:1px solid var(--line);border-radius:var(--r-m);background:#fff;padding:18px 18px;transition:border-color .15s,box-shadow .15s,transform .15s}
.rel a:hover{border-color:#dbe6f4;box-shadow:var(--shadow-soft);transform:translateY(-2px);text-decoration:none}
.rel .ic{width:38px;height:38px;border-radius:10px;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center}
.rel .ic svg{width:20px;height:20px}
.rel b{display:block;margin-top:12px;font-size:15px;font-weight:700;color:var(--ink)}
.rel span{display:block;margin-top:4px;font-size:13px;color:var(--faint);line-height:1.55}

/* 底部 CTA */
.fp-cta{margin:clamp(48px,6vw,72px) auto 0;max-width:1000px;padding:0 28px}
.fp-cta .box{position:relative;overflow:hidden;border-radius:var(--r-xl);background:var(--dark);color:#fff;text-align:center;padding:clamp(44px,6vw,64px) 28px}
.fp-cta .box::after{content:"";position:absolute;inset:0;background:radial-gradient(70% 90% at 50% -20%,rgba(0,111,238,.28),transparent 60%)}
.fp-cta .box>*{position:relative;z-index:1}
.fp-cta h2{font-size:clamp(24px,3.2vw,36px);font-weight:820;letter-spacing:-.02em}
.fp-cta p{margin-top:12px;color:rgba(255,255,255,.85);font-size:15.5px}
.fp-cta .btn{margin-top:26px;background:#fff;color:var(--ink)}
.fp-cta .btn:hover{background:#eef2f7}
.fp-cta .req{margin-top:15px;font-size:13px;color:rgba(255,255,255,.7)}

/* 页脚 */
.fp-foot{background:var(--dark);color:var(--on-dark);padding:48px 0 38px;margin-top:64px}
.fp-foot .ft-top{display:flex;gap:30px;flex-wrap:wrap;align-items:flex-start}
.fp-foot .brand{color:#fff;margin-bottom:10px}
.fp-foot .desc{font-size:13px;color:var(--on-dark-faint);max-width:320px;line-height:1.7}
.fp-foot .links{margin-left:auto;display:flex;gap:54px;flex-wrap:wrap}
.fp-foot .links h4{font-size:12.5px;color:var(--on-dark-faint);font-weight:650;letter-spacing:.04em;margin-bottom:13px}
.fp-foot .links a{display:block;font-size:13.5px;color:var(--on-dark);margin-bottom:10px}
.fp-foot .links a:hover{color:#fff;text-decoration:none}
.fp-foot .bottom{border-top:1px solid var(--border-dark);margin-top:32px;padding-top:22px;display:flex;gap:16px;flex-wrap:wrap;font-size:12.5px;color:var(--on-dark-faint)}
.fp-foot .bottom a{color:var(--on-dark-faint)}.fp-foot .bottom a:hover{color:#fff;text-decoration:none}
.fp-foot .bottom .r{margin-left:auto}

/* ===== Hero 升级:金色枝叶 + 「完全免费」奖章(与首页一致) ===== */
.fp-hero .wrap{display:flex;flex-direction:column;align-items:center;text-align:center}
.fp-hero .eyebrow{margin-top:16px}
.fp-hero h1{margin-top:14px}
.fp-hero .cta,.fp-hero .kv{justify-content:center}
.award{display:flex;align-items:center;justify-content:center;gap:clamp(6px,2vw,18px)}
.t-laurel{width:auto;height:clamp(72px,9vw,98px);flex:none;animation:laurelIn .7s ease .12s both}
.t-laurel.r{transform:scaleX(-1)}
@keyframes laurelIn{from{opacity:0}to{opacity:1}}
.free-chip{display:inline-flex;align-items:center;gap:10px;background:#fff;border:1px solid #EFE2BC;border-radius:14px;padding:7px 16px 7px 11px;box-shadow:0 16px 32px -18px rgba(120,90,10,.28),0 2px 6px rgba(16,38,76,.05);animation:badgePop .5s cubic-bezier(.22,1.2,.4,1) .06s both}
.free-chip .medal{width:30px;height:37px;flex:none}
.free-chip .t{text-align:left;line-height:1.08}
.free-chip .t b{display:block;font-size:15.5px;font-weight:850;color:var(--ink);letter-spacing:.01em}
.free-chip .t i{font-style:normal;font-size:11px;color:var(--faint);font-weight:650}
@keyframes badgePop{from{opacity:0;transform:scale(.7)}to{opacity:1;transform:none}}
@media(max-width:620px){.t-laurel{height:62px}}
@media(max-width:460px){.t-laurel{display:none}}

@media(max-width:760px){
  .pts,.steps,.uses,.rel{grid-template-columns:1fr}
  .fp-foot .links{gap:36px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}