/* ═══════════════════════════════════════════════════════════════
   PAPER V8 — 首页专属样式（Hero · 痛点 · 定价 · 工具 · CTA）
   Design: 学术蓝 · 专业 · 信任 · 合规
   共享变量/Reset/Nav/Footer → base.css
   最后更新: 2026-07-23 — 移除与 base.css 重复的变量和 reset
   ═══════════════════════════════════════════════════════════════ */

/* ── BUTTON 扩展尺寸（base.css 提供基础 .btn/.btn-outline/.btn-primary）── */
.btn-lg{height:52px;padding:0 32px;font-size:15px;border-radius:var(--radius)}
.btn-xl{height:60px;padding:0 40px;font-size:16px;border-radius:var(--radius)}

/* ── NAV ── */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:64px;
  background:rgba(255,255,255,0.96);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
  box-shadow:0 1px 8px rgba(20,24,31,0.04);
}
.nav-inner{
  max-width:1200px;margin:0 auto;padding:0 48px;
  display:flex;align-items:center;justify-content:space-between;height:100%;
}
.nav-brand{
  display:flex;align-items:center;gap:10px;
  font-family:var(--serif);font-weight:700;font-size:17px;
  color:var(--brand);letter-spacing:.02em;
  flex-shrink:0;
}
.nav-logo{
  width:48px;height:48px;
}
.nav-brand .logo-mark{
  width:32px;height:32px;
  background:var(--brand);
  color:#fff;font-size:16px;font-weight:900;
  display:flex;align-items:center;justify-content:center;
  border-radius:6px;
}
.nav-links{display:flex;gap:36px;list-style:none;align-items:center}
.nav-links a{font-size:13.5px;font-weight:500;color:var(--text-secondary);transition:color .15s}
.nav-links a:hover{color:var(--brand)}
.nav-acts{display:flex;align-items:center;gap:10px;flex-shrink:0}

/* Hamburger */
.nav-hamburger{
  display:none;
  flex-direction:column;gap:5px;
  padding:8px;cursor:pointer;
  z-index:101;
}
.nav-hamburger span{
  display:block;width:22px;height:2px;
  background:var(--text);border-radius:2px;
  transition:all .25s ease;
}
.nav-hamburger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-hamburger.active span:nth-child(2){opacity:0}
.nav-hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* Mobile menu overlay */
.mobile-menu{
  display:none;
  position:fixed;top:64px;left:0;right:0;bottom:0;
  background:rgba(255,255,255,0.98);
  backdrop-filter:blur(12px);
  z-index:99;
  padding:32px 24px;
  flex-direction:column;gap:8px;
  overflow-y:auto;
}
.mobile-menu.active{display:flex}
.mobile-menu a{
  display:block;padding:14px 16px;
  font-size:16px;font-weight:600;color:var(--text);
  border-radius:var(--radius-sm);
  transition:all .15s ease;
}
.mobile-menu a:hover{background:var(--brand-pale);color:var(--brand)}
.mobile-menu .mm-acts{
  display:flex;flex-direction:column;gap:10px;
  margin-top:16px;padding-top:16px;
  border-top:1px solid var(--border-light);
}
.mobile-menu .mm-acts .btn{width:100%;height:48px;font-size:15px}

/* ── HERO ── */
.hero{
  min-height:60vh;display:flex;align-items:center;justify-content:center;
  padding:96px 0 72px;position:relative;overflow:hidden;text-align:center;
  background:linear-gradient(180deg, var(--white) 0%, var(--bg) 100%);
}
.hero::before{
  content:'';position:absolute;
  top:-30%;right:-15%;width:700px;height:700px;
  background:radial-gradient(circle, rgba(26,54,88,0.03), transparent 70%);
  pointer-events:none;border-radius:50%;
}
.hero::after{
  content:'';position:absolute;
  bottom:-10%;left:-10%;width:500px;height:500px;
  background:radial-gradient(circle, rgba(184,148,45,0.04), transparent 70%);
  pointer-events:none;border-radius:50%;
}
.hero .wrap{position:relative;z-index:1;width:100%}
.hero-content{max-width:720px;margin:0 auto}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 16px;
  background:var(--gold-light);
  border-radius:20px;
  font-size:13px;font-weight:600;color:var(--gold-dark);
  margin-bottom:28px;
  letter-spacing:.02em;
}
.hero-badge .dot{
  width:7px;height:7px;border-radius:50%;background:var(--gold);
  animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero-title{
  font-family:var(--serif);
  font-weight:700;
  letter-spacing:.01em;
  line-height:1.15;
  margin-bottom:24px;
  color:var(--text);
}
.hero-brand{
  display:block;
  font-size:clamp(38px,5.5vw,56px);
  font-weight:800;
  letter-spacing:.04em;
  margin-bottom:10px;
}
.hero-title em{
  display:block;
  font-style:normal;
  font-size:clamp(17px,2.2vw,24px);
  font-weight:400;
  color:var(--gold);
  letter-spacing:.04em;
}
.hero-sub{
  font-size:15px;color:var(--text-secondary);
  line-height:1.85;margin-bottom:36px;max-width:620px;
  margin-left:auto;margin-right:auto;
}
.hero-stats{
  display:flex;gap:48px;margin-top:16px;margin-bottom:40px;justify-content:center;
}
.hero-stat{text-align:center}
.hero-stat .num{
  font-family:var(--num);font-size:36px;font-weight:800;
  color:var(--brand);letter-spacing:-.02em;line-height:1;
}
.hero-stat .label{font-size:13px;color:var(--text-secondary);margin-top:6px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}

/* ── HERO SWITCH (2026-06-18 优化) ── */
.hero-social-proof{
  margin-top:18px;font-size:13px;color:var(--text-tertiary);
}
.hero-social-proof strong{color:var(--brand);font-weight:700}
.hero-switch{
  display:inline-flex;background:var(--border-light);
  border-radius:40px;padding:5px;margin-bottom:36px;
}
.hswitch-btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:16px 32px;border-radius:36px;
  font-size:16px;font-weight:600;font-family:var(--sans);
  text-decoration:none;
  color:var(--text-secondary);
  transition:all 0.25s ease;
}
.hswitch-btn.active{
  background:var(--brand);color:#fff;
  box-shadow:0 4px 16px rgba(26,54,88,0.25);
}
.hswitch-btn:not(.active):hover{
  color:var(--brand);background:rgba(26,54,88,0.05);
}

/* ── SECTION COMMON ── */
.section{padding:64px 0}
.section-alt{background:var(--bg);padding:64px 0}
.section-head{margin-bottom:48px}
.section-head.center{text-align:center}
.section-head.center .section-desc{margin:0 auto}
.section-eyebrow{
  font-family:var(--serif);
  font-size:13px;font-style:italic;color:var(--gold);
  margin-bottom:12px;letter-spacing:.06em;
}
.section-title{
  font-family:var(--serif);
  font-size:clamp(26px,3vw,34px);
  font-weight:700;
  letter-spacing:.01em;
  line-height:1.3;
  margin-bottom:12px;
  color:var(--text);
}
.section-title em{font-style:italic;color:var(--gold)}
.section-desc{
  font-size:15px;color:var(--text-secondary);
  max-width:560px;line-height:1.85;
}

/* ── TIER BADGES ── */
.tier-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 14px;border-radius:20px;
  font-size:11.5px;font-weight:700;letter-spacing:.04em;
  white-space:nowrap;
}
.tier-badge.t1{background:#fdf0ef;color:var(--red)}
.tier-badge.t2{background:#fef3e2;color:#c2780a}
.tier-badge.t3{background:var(--brand-pale);color:var(--brand)}
.tier-badge.t4{background:#f1f4f7;color:var(--text-tertiary)}

/* ── KILLER CARDS ── */
.killer-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:16px;
  max-width:960px;margin:0 auto;
}
.killer-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:28px 24px;
  transition:all .2s ease;
}
.killer-card:hover{border-color:var(--brand);box-shadow:var(--shadow-md);transform:translateY(-1px)}
.killer-bad{
  font-size:13px;color:var(--red,#c0392b);margin-bottom:6px;
  text-decoration:line-through;opacity:.7;
}
.killer-good{
  font-size:18px;color:var(--brand);margin-bottom:8px;
  font-family:var(--serif);
}
.killer-good strong{font-weight:700}
.killer-desc{
  font-size:13px;color:var(--text-secondary);line-height:1.8;
}
@media(max-width:768px){
  .killer-grid{grid-template-columns:1fr}
}

/* ── TECH CORE ── */
.tech-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  max-width:960px;margin:0 auto;
}
.tech-item{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:18px 16px;
  text-align:center;font-size:13px;color:var(--text-secondary);line-height:1.7;
}
.tech-item strong{display:block;font-size:14px;color:var(--text);margin-bottom:4px}
.tech-item small{font-size:11px;color:var(--text-tertiary)}
.tech-icon{font-size:24px;display:block;margin-bottom:8px}
@media(max-width:768px){
  .tech-grid{grid-template-columns:repeat(2,1fr)}
}

/* ── PAIN POINT GRID ── */
.pain-grid{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:16px;
}
.pain-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:16px 18px;
  transition:all .25s ease;
  position:relative;
  overflow:hidden;
}
.pain-card::before{
  content:'';position:absolute;top:0;left:0;width:3px;height:100%;
  background:var(--brand-pale);
  transition:all .25s ease;
}
.pain-card:hover{
  border-color:#c8cdd6;
  transform:translateY(-2px);
  box-shadow:var(--shadow-md);
}
.pain-card:hover::before{background:var(--brand)}
.pain-card .pc-icon{font-size:18px;margin-bottom:8px;display:block}
.pain-card .pc-pain{
  font-size:13px;font-weight:700;color:var(--text);
  margin-bottom:4px;line-height:1.4;
}
.pain-card .pc-solve{
  font-size:11.5px;color:var(--text-secondary);
  line-height:1.6;
}
.pain-card .pc-solve strong{color:var(--brand);font-weight:600}

/* ── PAPER TYPE TABS ── */
.paper-tabs{
  display:flex;justify-content:center;gap:0;
  margin-bottom:48px;
  border:2px solid var(--border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  width:fit-content;
  margin-left:auto;margin-right:auto;
  box-shadow:0 2px 12px rgba(0,0,0,0.04);
}
.paper-tab{
  padding:14px 36px;font-size:15px;font-weight:700;
  color:var(--text-secondary);
  transition:all .25s ease;
  border-right:1px solid var(--border);
  background:var(--white);
  white-space:nowrap;letter-spacing:.01em;
}
.paper-tab:last-child{border-right:none}
.paper-tab.active{
  background:var(--brand);color:#fff;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(26,54,88,0.12);
}
.paper-tab:not(.active):hover{
  background:var(--brand-pale);
  color:var(--brand);transform:none;
}
.paper-content{display:none}
.paper-content.active{display:block}

.tier-group{margin-bottom:24px}
.tier-group:last-child{margin-bottom:0}
.tier-header{
  display:flex;align-items:center;gap:12px;
  margin-bottom:20px;
  padding-bottom:12px;
  border-bottom:1px solid var(--border-light);
  flex-wrap:wrap;
}
.tier-header .th-title{
  font-family:var(--serif);
  font-size:17px;font-weight:700;
  color:var(--text);
  letter-spacing:.01em;
}

/* ── WHY AGENT ── */
.compare-table{
  max-width:880px;margin:0 auto;
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  overflow:hidden;
}
.compare-row{
  display:grid;grid-template-columns:2fr 5fr;
  border-bottom:1px solid var(--border-light);
}
.compare-row:last-child{border-bottom:none}
.compare-row.head{
  background:var(--brand);
  color:#fff;
}
.compare-cell{
  padding:16px 24px;font-size:13.5px;
  display:flex;align-items:center;gap:10px;
  line-height:1.6;
}
.compare-row.head .compare-cell{
  font-family:var(--serif);
  font-weight:700;
  font-size:14px;
  letter-spacing:.02em;
}
.compare-cell .ci{flex-shrink:0;font-size:15px;font-weight:700}
.compare-cell .ci.x{color:var(--red)}
.compare-cell .ci.v{color:var(--green)}

/* ── FEATURE CARDS ── */
.feature-grid{
  display:grid;grid-template-columns:repeat(2, 1fr);gap:20px;
  margin-top:48px;
}
.feature-card{
  text-align:center;padding:36px 28px;
}
.feature-card .fc-icon{
  width:56px;height:56px;margin:0 auto 18px;
  background:var(--brand-pale);
  border-radius:var(--radius);
  display:flex;align-items:center;justify-content:center;
  font-size:26px;
}
.feature-card .fc-title{
  font-family:var(--serif);
  font-size:16px;font-weight:700;margin-bottom:8px;
}
.feature-card .fc-desc{
  font-size:13px;color:var(--text-secondary);
  line-height:1.75;
}

/* ── TOOLS ── */
.tools-grid{
  display:grid;grid-template-columns:repeat(2, 1fr);gap:24px;
  max-width:1200px;margin:0 auto;
}
.tool-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:32px 28px;
  transition:box-shadow 0.2s;
}
.tool-card:hover{box-shadow:var(--shadow-md)}
.tool-card-head{
  display:flex;align-items:flex-start;gap:16px;margin-bottom:20px;
}
.tool-icon{
  width:52px;height:52px;border-radius:var(--radius);
  background:var(--brand-pale);
  display:flex;align-items:center;justify-content:center;
  font-size:26px;flex-shrink:0;
}
.tool-title{
  font-family:var(--serif);font-size:18px;font-weight:700;
  color:var(--text);margin-bottom:4px;
}
.tool-sub{
  font-size:13px;color:var(--text-tertiary);line-height:1.5;
}
.tool-input{
  width:100%;min-height:120px;
  background:var(--bg);border:1.5px solid var(--border);
  border-radius:var(--radius);padding:14px 16px;
  font-family:var(--sans);font-size:14px;color:var(--text);
  line-height:1.8;resize:vertical;
  transition:border-color 0.2s;
}
.tool-input:focus{outline:none;border-color:var(--brand)}
.tool-input::placeholder{color:var(--text-tertiary)}
.tool-foot{
  display:flex;justify-content:space-between;align-items:center;
  margin-top:12px;
}
.tool-limit{display:none}
.tool-btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:40px;padding:0 24px;
  font-size:14px;font-weight:600;font-family:var(--sans);
  border-radius:var(--radius-sm);
  background:var(--brand);color:#fff;border:none;
  cursor:pointer;
  transition:all 0.2s;
}
.tool-btn:hover{background:var(--brand-light);transform:translateY(-1px)}
.tool-btn:disabled{opacity:0.5;cursor:not-allowed;transform:none}
.tool-btn.loading{pointer-events:none}

.tool-result{margin-top:16px}
.tool-result .tr-score{
  display:flex;align-items:center;gap:12px;margin-bottom:14px;
}
.tool-result .tr-score-num{
  font-family:var(--num);font-size:40px;font-weight:800;
}
.tool-result .tr-score-num.low{color:var(--green)}
.tool-result .tr-score-num.mid{color:var(--gold)}
.tool-result .tr-score-num.high{color:var(--red)}
.tool-result .tr-score-label{
  font-size:14px;color:var(--text-secondary);
}
.tool-result .tr-score-label strong{display:block;font-size:16px;color:var(--text)}
.tool-result .tr-detail{
  background:var(--bg);border-radius:var(--radius);
  padding:14px 16px;font-size:13px;color:var(--text-secondary);
  line-height:1.8;margin-bottom:12px;
}
.tool-result .tr-detail span{display:block;margin:3px 0}
.tool-result .tr-detail .risk-item{color:var(--red);font-weight:500}
.tool-result .tr-detail .ok-item{color:var(--green)}
.tool-result .tr-cta{
  background:var(--brand-pale);border-radius:var(--radius);
  padding:14px 16px;text-align:center;
  font-size:13px;color:var(--brand);line-height:1.7;
}
.tool-result .tr-cta strong{font-size:14px}
.tool-result .tr-cta a{
  display:inline-block;margin-top:8px;
  color:#fff;background:var(--brand);
  padding:8px 20px;border-radius:20px;
  font-weight:600;font-size:13px;
  text-decoration:none;
}
.tool-learn-more{
  display:block;text-align:center;margin-top:10px;
  font-size:12px;color:var(--brand);font-weight:500;
  text-decoration:none;padding:6px;border-radius:var(--radius-sm);
  transition:all .15s;
}
.tool-learn-more:hover{background:var(--brand-pale)}
.tool-error{
  color:var(--red);font-size:13px;margin-top:10px;
  padding:10px 14px;background:var(--red-bg);
  border-radius:var(--radius);
}

/* ── TOOLS RESPONSIVE ── */
@media(max-width:768px){
  .tools-grid{grid-template-columns:1fr;gap:16px}
  .tool-card{padding:24px 20px}
  .tool-input{min-height:100px;font-size:13px}
}
.lifecycle-wrap{
  overflow-x:auto;-webkit-overflow-scrolling:touch;
  padding-bottom:8px;
}
.lifecycle{
  display:flex;align-items:flex-start;justify-content:center;
  gap:0;max-width:1000px;margin:0 auto;
  padding:20px 0;min-width:fit-content;
}
.lc-stage{
  text-align:center;min-width:80px;
  padding:16px 10px;
  position:relative;flex-shrink:0;
}
.lc-stage::after{
  content:'→';position:absolute;right:-8px;top:50%;
  transform:translateY(-50%);
  color:var(--text-tertiary);font-size:12px;
}
.lc-stage:last-child::after{display:none}
.lc-stage .lc-num{
  font-family:var(--num);font-size:11px;font-weight:700;
  color:var(--brand);background:var(--brand-pale);
  width:28px;height:28px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 8px;
}
.lc-stage .lc-label{
  font-size:11px;color:var(--text-secondary);
  line-height:1.4;
}

/* ── SOCIAL PROOF ── */
.proof-grid{
  display:grid;grid-template-columns:repeat(4, 1fr);gap:20px;
}
.proof-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:32px 24px;
  text-align:center;
  transition:all .25s ease;
}
.proof-card:hover{
  border-color:#c8cdd6;
  box-shadow:var(--shadow-md);
  transform:translateY(-2px);
}
.proof-card .pf-num{
  font-family:var(--num);font-size:40px;font-weight:800;
  color:var(--brand);letter-spacing:-.02em;
  line-height:1;
}
.proof-card .pf-label{
  font-size:13px;color:var(--text-secondary);margin-top:8px;
}

/* ── FEEDBACK PAPER (SEO-dense 使用反馈) ── */
.feedback-paper{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:56px 52px;
  position:relative;
  overflow:hidden;
}
.feedback-paper::before{
  content:'';position:absolute;inset:0;
  background:repeating-linear-gradient(transparent,transparent 27px,var(--border-light) 27px,var(--border-light) 28px);
  pointer-events:none;opacity:.5;
}
.feedback-paper-inner{position:relative;z-index:1}
.feedback-paper-inner .fp-title{
  font-family:var(--serif);font-size:16px;font-weight:700;
  text-align:center;margin-bottom:32px;letter-spacing:.04em;
  color:var(--brand);
}
.fp-columns{
  display:grid;grid-template-columns:1fr 1fr;
  gap:0;column-gap:40px;
}
.fp-col{display:flex;flex-direction:column;gap:0}
.fp-note.folded{display:none}
.feedback-details{max-width:960px;margin:0 auto}
.feedback-summary{text-align:center;cursor:pointer;font-size:14px;color:var(--text2);padding:8px 0;outline:none;list-style:none}
.feedback-summary:hover{color:var(--brand)}
.feedback-summary::-webkit-details-marker{display:none}
.feedback-toggle-wrap{text-align:center;margin-top:8px}
.feedback-toggle{display:inline-block;padding:10px 28px;background:var(--surface);border:1.5px solid var(--border);border-radius:24px;font-size:13px;color:var(--text2);cursor:pointer;font-family:var(--sans);transition:all .15s}
.feedback-toggle:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-pale,#e8eff7)}
.fp-note{
  padding:18px 0;border-bottom:1px dashed var(--border);
  font-family:var(--serif);font-size:13px;line-height:2;color:var(--text-secondary);
}
.fp-note:last-child{border-bottom:none}
.fp-note strong{color:var(--text);font-weight:700}
.fp-note em{font-style:normal;color:var(--gold);font-weight:600}
/* Overflow column for extra density */
.fp-overflow{
  margin-top:18px;padding-top:18px;
  border-top:1px solid var(--border);
}
.fp-overflow .fp-note{font-size:12px;padding:12px 0}

/* ── SECURITY BAR ── */
.security-bar{
  display:flex;align-items:center;justify-content:center;
  gap:48px;flex-wrap:wrap;
  padding:36px 40px;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
}
.security-item{
  display:flex;align-items:center;gap:10px;
  font-size:13px;color:var(--text-secondary);
}
.security-item strong{color:var(--text);font-weight:600}
.security-item .si-icon{font-size:20px}

/* ── PRICING ── */
.pricing-grid-three{
  display:grid;grid-template-columns:repeat(3, 1fr);gap:20px;
  max-width:1000px;margin:0 auto;align-items:stretch;
}
.price-card-simple{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:32px 24px;
  text-align:center;
  transition:all .25s ease;
  position:relative;
  display:flex;flex-direction:column;gap:10px;
}
.price-card-simple .btn{margin-top:auto}
.price-card-simple:hover{
  border-color:#c8cdd6;
  box-shadow:var(--shadow-md);
  transform:translateY(-2px);
}
.price-card-simple.featured{
  border-color:var(--brand);
  box-shadow:var(--shadow-sm);
}
.price-card-simple.popular{
  border-color:var(--gold);
  border-width:2px;
  box-shadow:0 4px 24px rgba(184,148,45,0.15);
  transform:scale(1.03);
}
.pcs-popular-badge{
  position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  background:linear-gradient(135deg, #b8942d, #d4a843);
  color:#fff;font-size:12px;font-weight:700;
  padding:4px 16px;border-radius:12px;
  white-space:nowrap;letter-spacing:.04em;
  box-shadow:0 2px 10px rgba(184,148,45,0.3);
}
.price-card-simple .pcs-badge{
  font-size:13px;font-weight:700;color:var(--text);
}
.price-card-simple .pcs-type{
  font-size:11px;font-weight:700;color:var(--gold);
  letter-spacing:.06em;
}
.price-card-simple.featured .pcs-type{color:var(--brand)}
.price-card-simple .pcs-amt{
  font-family:var(--num);font-size:40px;font-weight:800;
  color:var(--brand);letter-spacing:-.02em;
  line-height:1;
}
.price-card-simple .pcs-unit{font-size:14px;font-weight:400;color:var(--text-tertiary)}
.price-card-simple .pcs-desc{
  font-size:12px;color:var(--text-tertiary);
  line-height:1.5;min-height:48px;display:flex;align-items:center;justify-content:center;flex-direction:column;
}
.price-card-simple.featured .pcs-desc{color:var(--text-secondary)}
.price-card-simple.free-tier{
  background:linear-gradient(135deg, #f5fdf5, #fafffa);
  border-color:#c8e6c9;border-style:dashed;
}
.price-card-simple.free-tier .pcs-amt{color:var(--green)}
.price-card-simple.free-tier .pcs-type{color:var(--green)}
/* 回形针装饰 */
.price-card-simple::before{
  content:'📎';
  position:absolute;top:10px;right:14px;
  font-size:18px;opacity:.25;
  transform:rotate(15deg);
  pointer-events:none;
}
.price-card-simple.featured::before{
  content:'📌';
  opacity:.45;
  color:var(--gold);
  transform:rotate(5deg);
  font-size:20px;
}
.pricing-note{
  text-align:center;margin-top:24px;
  font-size:12px;color:var(--text-tertiary);
}

/* ── CTA BANNER ── */
.cta-banner{
  background:var(--brand);
  border-radius:var(--radius-lg);
  padding:56px 48px;
  text-align:center;
  color:#fff;
}
.cta-banner .cta-title{
  font-family:var(--serif);
  font-size:clamp(24px,2.5vw,30px);
  font-weight:700;
  margin-bottom:12px;
  letter-spacing:.01em;
}
.cta-banner .cta-desc{
  font-size:15px;color:rgba(255,255,255,.7);
  margin-bottom:28px;line-height:1.8;
}
.cta-banner .btn-primary{
  background:var(--gold);
  border-color:var(--gold);
  color:var(--brand);
  font-weight:700;
  box-shadow:0 4px 16px rgba(184,148,45,0.3);
}
.cta-banner .btn-primary:hover{
  background:#c8a44e;
  box-shadow:0 6px 24px rgba(184,148,45,0.4);
}

/* ── SEO KEYWORD STRIP ── */
.seo-strip{
  padding:32px 0;
  border-top:1px solid var(--border-light);
}
.seo-strip h3{
  font-size:12px;font-weight:700;color:var(--text-secondary);
  margin-bottom:8px;letter-spacing:.04em;
}
.seo-strip p{
  font-size:10.5px;color:var(--text-tertiary);
  line-height:2.6;text-align:left;
  max-width:960px;margin:0 auto;
}

/* ── FOOTER ── */
.footer{
  padding:40px 0;
  border-top:1px solid var(--border-light);
  font-size:13px;color:var(--text-tertiary);
}
.footer .wrap{
  display:flex;flex-direction:column;gap:20px;
}
.footer-top{
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:16px;
}
.footer-disclaimer{
  font-size:11px;color:var(--text-tertiary);
  line-height:1.8;padding-top:16px;
  border-top:1px solid var(--border-light);
}
.footer-disclaimer p{max-width:960px}
.seo-mini{margin-top:12px;max-width:960px}
.seo-mini summary{text-align:center}
.footer-links{display:flex;gap:24px;list-style:none;flex-wrap:wrap}
.footer-links a:hover{color:var(--text-secondary)}

/* ── REVEAL ANIMATION ── */
.reveal{opacity:0;transform:translateY(20px);transition:all .6s cubic-bezier(.22,1,.36,1)}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ═════════════════════════════════════════════════════════
   RESPONSIVE BREAKPOINTS
   ═════════════════════════════════════════════════════════ */

/* ── Wide (1200+) - fine-tune spacing ── */
@media(min-width:1400px){
  .wrap{max-width:1280px}
  .nav-inner{max-width:1280px}
}

/* ── Desktop (1025-1199) - default styles apply ── */

/* ── Small Desktop / Landscape Tablet (769-1024) ── */
@media(max-width:1024px){
  .wrap{padding:0 36px}
  .nav-inner{padding:0 36px}
  .nav-links{gap:24px}
  .nav-links a{font-size:12.5px}

  .hero-content{max-width:600px}
  .hero-stats{gap:36px}
  .hero-stat .num{font-size:32px}

  .pain-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .proof-grid{grid-template-columns:repeat(2,1fr)}
  .fp-columns{grid-template-columns:1fr}
  .feedback-paper{padding:40px 32px}

  .section{padding:80px 0}
  .section-alt{padding:80px 0}
  .section-head{margin-bottom:48px}

  .compare-cell{padding:14px 20px;font-size:12.5px}
}

/* ── Tablet (481-768) ── */
@media(max-width:768px){
  html{font-size:15px}
  .wrap{padding:0 20px}
  .nav-inner{padding:0 20px}

  /* Show hamburger, hide desktop nav */
  .nav-links{display:none}
  .nav-acts{display:none}
  .nav-hamburger{display:flex}

  .hero{
    min-height:auto;padding-top:100px;padding-bottom:64px;
  }
  .hero-content{max-width:100%}
  .hero-brand{font-size:clamp(28px,7vw,38px)}
  .hero-title em{font-size:clamp(15px,3.5vw,18px)}
  .hero-sub{font-size:14px;max-width:100%}
  .hero-stats{gap:20px;flex-wrap:wrap;justify-content:flex-start}
  .hero-stat .num{font-size:28px}
  .hero-btns{flex-direction:column}
  .hero-btns .btn-xl{width:100%;justify-content:center}

  .section{padding:48px 0}
  .section-alt{padding:48px 0}
  .section-head{margin-bottom:40px}
  .section-title{font-size:24px}
  .section-desc{font-size:14px;max-width:100%}

  /* Pain grid → 1 col */
  .pain-grid{grid-template-columns:1fr}
  .tier-header{flex-direction:column;align-items:flex-start;gap:8px}

  /* Feature grid → 1 col */
  .feature-grid{grid-template-columns:1fr;gap:12px}
  .feature-card{padding:24px 20px}

  /* Proof grid → 2 col */
  .proof-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .proof-card{padding:24px 16px}
  .proof-card .pf-num{font-size:32px}

  /* Testimonials → 1 col */
  .feedback-paper{padding:32px 20px}
  .fp-columns{grid-template-columns:1fr}

  /* Comparison table - stack */
  .compare-row{grid-template-columns:1fr}
  .compare-row.head .compare-cell:last-child{display:none}
  .compare-cell{padding:12px 16px;font-size:12px}

  /* Pricing → 2 col */
  .pricing-grid-three{grid-template-columns:repeat(2, 1fr);gap:14px}
  .price-card-simple{padding:28px 20px}
  .price-card-simple .pcs-amt{font-size:36px}

  /* Paper tabs */
  .paper-tabs{width:100%}
  .paper-tab{flex:1;text-align:center;padding:12px 16px;font-size:13px}

  /* Security bar */
  .security-bar{flex-direction:column;gap:16px;padding:28px 24px;align-items:flex-start}

  /* Lifecycle - horizontal scroll */
  .lifecycle{justify-content:flex-start;gap:0}
  .lc-stage{min-width:68px;padding:10px 4px}
  .lc-stage::after{right:-4px;font-size:10px}
  .lc-stage .lc-label{font-size:10px}

  /* CTA */
  .cta-banner{padding:36px 24px}

  /* Mobile menu active */
  .mobile-menu.active{display:flex}
}

/* ── Phone (≤480) ── */
@media(max-width:480px){
  html{font-size:14px}
  .wrap{padding:0 16px}
  .nav-inner{padding:0 16px}
  .nav-brand{font-size:15px}
  .nav-logo{width:36px;height:36px}

  .hero{padding-top:88px;padding-bottom:48px}
  .hero-brand{font-size:24px}
  .hero-title em{font-size:14px}
  .hero-sub{font-size:12px;margin-bottom:24px}
  .hero-stats{gap:16px}
  .hero-stat .num{font-size:24px}
  .hero-stat .label{font-size:11px}

  .section{padding:40px 0}
  .section-alt{padding:40px 0}
  .section-head{margin-bottom:28px}
  .section-eyebrow{font-size:12px}
  .section-title{font-size:22px}

  .pain-card{padding:22px 18px}
  .pain-card .pc-icon{font-size:20px;margin-bottom:10px}
  .pain-card .pc-pain{font-size:13px}
  .pain-card .pc-solve{font-size:12px}

  .proof-grid{grid-template-columns:1fr 1fr;gap:10px}
  .proof-card{padding:20px 14px}
  .proof-card .pf-num{font-size:28px}
  .proof-card .pf-label{font-size:12px}

  .paper-tab{padding:10px 12px;font-size:12px}

  .compare-cell{padding:10px 14px;font-size:11.5px}

  .fp-note{font-size:12px;padding:14px 0}

  .pricing-grid-three{grid-template-columns:1fr;gap:14px}
  .price-card-simple{padding:22px 16px;gap:10px}
  .price-card-simple .pcs-amt{font-size:32px}
  .price-card-simple.popular{transform:none}
  .price-card-simple .pcs-badge{font-size:12px}

  .cta-banner{padding:28px 20px}
  .cta-banner .cta-title{font-size:20px}
  .cta-banner .cta-desc{font-size:13px}

  .security-bar{padding:20px 18px;gap:12px}
  .security-item{font-size:12px}

  .footer .wrap{flex-direction:column;text-align:center;gap:12px}
  .footer-links{justify-content:center}

  .seo-strip{padding:24px 0}
  .seo-strip p{line-height:2.4}
}