/* =============================================================
 * 奇妙绘本 · 官网落地页（V2.4）
 * 与 theme.css 共用设计变量；本文件只放官网专属版式
 * 断点：980（Pad 竖）/ 760（手机）
 * ============================================================= */

.s-site{margin:0;color:var(--ink);background:var(--paper);
  background-image:radial-gradient(rgba(180,140,90,.05) 1px,transparent 1px);background-size:20px 20px}
.s-wrap{width:min(1180px,100%);margin:0 auto;padding:0 clamp(18px,4vw,40px)}
.s-skip{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 16px;border-radius:0 0 12px 0;z-index:99}
.s-skip:focus{left:0;top:0}

/* ---------- 顶栏 ---------- */
.s-nav{position:sticky;top:0;z-index:60;transition:box-shadow .25s,background .25s}
.s-nav::before{content:"";position:absolute;inset:0;background:rgba(255,252,246,.82);backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;transition:border-color .25s}
.s-nav.stuck::before{border-bottom-color:var(--line);box-shadow:0 10px 30px -22px rgba(93,64,38,.5)}
.s-nav-in{position:relative;display:flex;align-items:center;gap:clamp(14px,3vw,34px);height:74px}
.s-brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);flex:0 0 auto}
.s-brand img{width:38px;height:38px;border-radius:12px;display:block;box-shadow:0 4px 12px rgba(120,64,20,.18)}
.s-brand b{display:block;font-size:16.5px;font-weight:800;letter-spacing:.01em;line-height:1.2}
.s-brand i{display:block;font-style:normal;font-size:9.5px;letter-spacing:.16em;color:var(--muted);font-weight:700;margin-top:2px}
.s-menu{display:flex;align-items:center;gap:4px;margin-left:8px}
.s-menu a{text-decoration:none;color:var(--ink-2);font-size:14px;font-weight:600;padding:9px 14px;border-radius:999px;transition:.18s}
.s-menu a:hover{background:var(--paper-2);color:var(--brand-deep)}
.s-nav-act{margin-left:auto;display:flex;align-items:center;gap:8px}
.s-nav-act .btn{font-size:13.5px;padding:9px 18px}
.s-burger{display:none;margin-left:auto;width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:12px;
  align-items:center;justify-content:center;gap:4px;flex-direction:column;cursor:pointer}
.s-burger i{display:block;width:16px;height:1.8px;border-radius:2px;background:var(--ink-2);transition:.2s}
.s-burger.on i:nth-child(1){transform:translateY(5.8px) rotate(45deg)}
.s-burger.on i:nth-child(2){opacity:0}
.s-burger.on i:nth-child(3){transform:translateY(-5.8px) rotate(-45deg)}

/* ---------- 按钮补充 ---------- */
.s-site .btn{border-radius:999px;font-weight:700;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px}
.s-site .btn.lg{padding:15px 30px;font-size:15.5px}
.s-site .btn.primary{box-shadow:0 10px 24px -12px rgba(200,101,36,.85)}
.s-site .btn.primary:hover{transform:translateY(-1px);box-shadow:0 14px 28px -12px rgba(200,101,36,.95)}
.s-site .btn.ghost{background:#fff;border:1px solid var(--line-2);color:var(--ink-2)}
.s-site .btn.ghost:hover{border-color:var(--brand);color:var(--brand-deep)}

/* ---------- Hero ---------- */
.s-hero{position:relative;overflow:hidden;padding:clamp(38px,6vw,74px) 0 clamp(30px,5vw,56px)}
.s-hero::before{content:"";position:absolute;left:50%;top:-340px;width:1180px;height:760px;transform:translateX(-50%);
  background:radial-gradient(closest-side,rgba(255,214,150,.55),rgba(255,236,208,.28) 58%,transparent 72%);pointer-events:none}
.s-hero-in{position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:clamp(24px,4vw,56px);align-items:center}
.s-eyebrow{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);
  border-radius:999px;padding:6px 14px 6px 10px;font-size:12.5px;font-weight:700;color:var(--brand-deep);letter-spacing:.02em}
.s-eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 3px rgba(232,134,60,.18)}
.s-hero h1{margin:20px 0 0;font-size:clamp(38px,5.4vw,64px);line-height:1.12;letter-spacing:-.015em;font-weight:800}
.s-hero h1 em{font-style:normal;position:relative;color:var(--brand-deep);white-space:nowrap}
.s-hero h1 em::after{content:"";position:absolute;left:-2%;right:-2%;bottom:6%;height:14px;border-radius:8px;
  background:linear-gradient(90deg,rgba(247,206,122,.85),rgba(247,206,122,.35));z-index:-1}
.s-lead{margin:20px 0 0;font-size:clamp(14.5px,1.55vw,17px);line-height:1.95;color:var(--ink-2);max-width:29em}
.s-lead b{color:var(--ink);font-weight:700}
.s-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.s-micro{display:flex;flex-wrap:wrap;gap:8px 18px;margin:24px 0 0;padding:0;list-style:none;font-size:12.5px;color:var(--muted);font-weight:600}
.s-micro li{display:flex;align-items:center;gap:6px}
.s-micro li::before{content:"";width:14px;height:14px;border-radius:50%;flex:0 0 auto;
  background:var(--sage-soft) url("data:image/svg+xml;utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2.4 6.3l2.3 2.2 4.9-5' fill='none' stroke='%235E9B6C' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/10px no-repeat;
  box-shadow:inset 0 0 0 1px rgba(127,163,119,.35)}

/* Hero 书本装置 */
.s-hero-art{position:relative;display:flex;flex-direction:column;justify-content:center;align-items:center;min-height:min(46vw,470px)}
.s-book{position:relative;display:flex;width:min(430px,100%);perspective:1600px;
  filter:drop-shadow(0 24px 34px rgba(120,74,30,.20))}
.s-book::after{content:"";position:absolute;left:8px;right:8px;bottom:-9px;height:9px;border-radius:0 0 14px 14px;
  background:#F0E2CB;box-shadow:0 7px 0 -2px #E7D7BC,0 14px 0 -4px #DCC9AC}
/* V3.4：不用 aspect-ratio（部分国产/微信内核不支持，整块塌成图片原始比例）。
 * padding-top 百分比永远按**包含块宽度**算：.s-page 宽是 .s-book 的一半，
 * 想要 3:4 就是 0.5 × 4/3 = 66.6667%。图片绝对铺满。 */
.s-page{position:relative;flex:1 1 50%;padding-top:66.6667%;overflow:hidden;background:var(--cream)}
.s-page img{position:absolute;left:0;top:0;width:100%;height:100%;object-fit:cover;display:block}
.s-page-l{border-radius:14px 2px 2px 14px;transform-origin:right center;transform:rotateY(7deg);
  box-shadow:inset -26px 0 30px -26px rgba(70,42,18,.55)}
.s-page-r{border-radius:2px 14px 14px 2px;transform-origin:left center;transform:rotateY(-7deg);
  box-shadow:inset 26px 0 30px -26px rgba(70,42,18,.55)}
.s-spine{position:absolute;left:50%;top:0;bottom:0;width:18px;transform:translateX(-50%);pointer-events:none;
  background:linear-gradient(90deg,rgba(80,50,24,.3),rgba(255,244,220,.16) 44%,rgba(255,244,220,.22) 50%,rgba(255,244,220,.16) 56%,rgba(80,50,24,.3))}
.s-spine::after{content:"";position:absolute;left:50%;top:6%;bottom:6%;width:1px;transform:translateX(-50%);
  background:linear-gradient(180deg,transparent,rgba(160,110,50,.5) 18%,rgba(160,110,50,.5) 82%,transparent)}
.s-tap{position:absolute;display:flex;align-items:center;gap:7px;padding:7px 13px 7px 9px;border-radius:999px;
  background:rgba(255,252,246,.94);border:1.5px dashed var(--brand);color:var(--brand-deep);font-size:12.5px;font-weight:800;
  box-shadow:0 10px 24px -12px rgba(120,64,20,.6);animation:tapFloat 4.6s ease-in-out infinite}
.s-tap .pin{width:19px;height:19px;border-radius:50%;background:radial-gradient(circle at 34% 28%,#FFD79B,var(--brand) 72%);
  display:flex;align-items:center;justify-content:center;box-shadow:0 0 0 4px rgba(232,134,60,.16)}
.s-tap .pin b{width:0;height:0;border-left:6px solid #fff;border-top:4px solid transparent;border-bottom:4px solid transparent;margin-left:2px}
.s-tap.t1{left:4%;bottom:14%}
.s-tap.t2{right:5%;top:34%;animation-delay:1.5s}
.s-tap.en{letter-spacing:.02em}
@keyframes tapFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-7px)}}
.s-art-note{margin-top:28px;font-size:11.5px;color:var(--muted);font-weight:600;text-align:center}

/* ---------- 数据条 ---------- */
.s-stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(255,247,235,.55)}
.s-stats-in{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding-top:26px;padding-bottom:26px}
.s-stat{text-align:center;padding:4px 8px;position:relative}
.s-stat+.s-stat::before{content:"";position:absolute;left:0;top:18%;bottom:18%;width:1px;background:var(--line)}
.s-stat b{display:block;font-size:clamp(30px,3.6vw,42px);font-weight:800;line-height:1.1;color:var(--brand-deep);letter-spacing:-.02em}
.s-stat b i{font-style:normal;font-size:.5em;font-weight:700;margin-left:2px;color:var(--ink-2)}
.s-stat span{display:block;margin-top:6px;font-size:12.5px;color:var(--muted);font-weight:600}

/* ---------- 通用章节 ---------- */
.s-sec{padding:clamp(56px,8vw,112px) 0}
.s-sec.tight{padding-top:clamp(34px,5vw,64px)}
.s-head{max-width:660px}
.s-tag{display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:.14em;color:var(--brand-deep);
  background:var(--brand-soft);border-radius:6px;padding:5px 10px}
.s-head h2{margin:16px 0 0;font-size:clamp(27px,3.4vw,40px);line-height:1.28;letter-spacing:-.01em;font-weight:800}
.s-head h2 br{display:none}
.s-head p{margin:16px 0 0;font-size:15px;line-height:1.95;color:var(--ink-2)}

/* ---------- 能力三行（图文交替） ---------- */
.s-rows{margin-top:clamp(30px,4vw,54px);display:flex;flex-direction:column;gap:clamp(26px,4vw,56px)}
.s-row{display:grid;grid-template-columns:.92fr 1.08fr;gap:clamp(20px,4vw,58px);align-items:center}
.s-row.rev .s-row-art{order:2}
.s-row-art{position:relative;border-radius:22px;overflow:hidden;border:1px solid var(--line);background:var(--cream);
  box-shadow:0 22px 50px -34px rgba(93,64,38,.7);padding-top:68.75%}
.s-row-art img{position:absolute;left:0;top:0;display:block;width:100%;height:100%;object-fit:cover;object-position:center}
.s-row-art .badge{position:absolute;left:14px;top:14px;background:rgba(255,252,246,.94);border:1px solid var(--line);
  border-radius:999px;padding:5px 11px;font-size:11.5px;font-weight:800;color:var(--brand-deep)}
.s-num{display:inline-block;font-size:12px;font-weight:800;letter-spacing:.1em;color:var(--brand);margin-bottom:8px}
.s-row-tx h3{margin:0 0 10px;font-size:clamp(20px,2.3vw,26px);font-weight:800;letter-spacing:-.01em}
.s-row-tx p{margin:0;font-size:14.5px;line-height:1.95;color:var(--ink-2)}
.s-li{margin:16px 0 0;padding:0;list-style:none;display:flex;flex-direction:column;gap:9px}
.s-li li{position:relative;padding-left:22px;font-size:13.5px;line-height:1.8;color:var(--ink-2)}
.s-li li b{color:var(--ink);font-weight:700}
.s-li li::before{content:"";position:absolute;left:2px;top:.62em;width:8px;height:8px;border-radius:50%;
  background:var(--butter);box-shadow:inset 0 0 0 1.5px rgba(200,140,40,.45)}

/* ---------- 绘本库 ---------- */
.s-shelf{background:linear-gradient(180deg,rgba(255,247,235,.75),rgba(255,252,246,0))}
.s-shelf-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap}
.s-shelf-head p{margin:6px 0 0;font-size:13.5px;color:var(--muted);font-weight:600}
.s-books{--bgap:clamp(14px,2.2vw,26px);display:flex;flex-wrap:wrap;justify-content:center;
  gap:var(--bgap);margin-top:clamp(24px,3.4vw,40px)}
.s-book-card{flex:0 0 clamp(220px,24vw,300px);min-width:0;
  background:#fff;border:1px solid var(--line);border-radius:20px;padding:12px;text-decoration:none;color:inherit;
  display:flex;flex-direction:column;gap:12px;transition:.22s;box-shadow:0 12px 30px -26px rgba(93,64,38,.8)}
.s-book-card:hover{transform:translateY(-4px);border-color:#F0CFA8;box-shadow:0 26px 46px -28px rgba(93,64,38,.7)}
.s-bc-cover{position:relative;padding-top:133.3333%;border-radius:12px 16px 16px 12px;overflow:hidden;background:var(--cream)}
.s-bc-cover img{position:absolute;left:0;top:0;width:100%;height:100%;object-fit:cover;display:block}
.s-bc-cover::before{content:"";position:absolute;left:0;top:0;bottom:0;width:10px;z-index:2;
  background:linear-gradient(90deg,rgba(60,36,16,.3),rgba(60,36,16,.03) 76%,transparent)}
.s-bc-cat{position:absolute;right:8px;top:8px;z-index:3;background:rgba(255,252,246,.94);border-radius:999px;
  padding:3px 9px;font-size:10.5px;font-weight:800;color:var(--brand-deep)}
.s-bc-tx{padding:0 4px 4px}
.s-bc-tx h3{margin:0;font-size:15px;font-weight:800;line-height:1.5}
.s-bc-tx p{margin:4px 0 0;font-size:12px;line-height:1.7;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.s-bc-meta{display:flex;align-items:center;justify-content:space-between;margin-top:10px;font-size:11.5px;color:var(--muted);font-weight:700}
.s-bc-meta em{font-style:normal;color:var(--brand-deep)}
.s-empty{flex:1 1 100%;text-align:center;padding:40px 0;color:var(--muted);font-size:14px}

/* ---------- 理念四卡 ---------- */
.s-idea{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(12px,2vw,20px);margin-top:clamp(26px,3.4vw,44px)}
.s-idea-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:clamp(18px,2.2vw,26px);
  transition:.22s;position:relative;overflow:hidden}
.s-idea-card::after{content:"";position:absolute;right:-26px;top:-26px;width:78px;height:78px;border-radius:50%;
  background:var(--brand-soft);opacity:.42;transition:.22s}
.s-idea-card:hover{transform:translateY(-3px);border-color:#F0CFA8}
.s-idea-card:hover::after{opacity:.7;transform:scale(1.06)}
.s-ic{width:40px;height:40px;border-radius:13px;background:var(--brand-soft);display:flex;align-items:center;justify-content:center;
  color:var(--brand-deep);position:relative;z-index:1;box-shadow:inset 0 0 0 1px rgba(232,134,60,.18)}
.s-ic svg{width:20px;height:20px;display:block}
.s-idea-card h3{margin:14px 0 8px;font-size:15.5px;font-weight:800;position:relative;z-index:1}
.s-idea-card p{margin:0;font-size:13px;line-height:1.85;color:var(--ink-2);position:relative;z-index:1}

/* ---------- 三步 ---------- */
.s-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(14px,2.4vw,30px);margin-top:clamp(26px,3.4vw,44px);
  counter-reset:step}
.s-step{position:relative;padding-top:6px}
.s-step .n{width:44px;height:44px;border-radius:14px;background:var(--brand-soft);color:var(--brand-deep);display:flex;
  align-items:center;justify-content:center;font-size:16px;font-weight:800;letter-spacing:.02em;margin-bottom:14px;
  box-shadow:inset 0 0 0 1px rgba(232,134,60,.22)}
.s-step h3{margin:0 0 8px;font-size:16.5px;font-weight:800}
.s-step p{margin:0;font-size:13.5px;line-height:1.9;color:var(--ink-2)}
.s-step::after{content:"";position:absolute;left:60px;top:30px;width:calc(100% - 60px);height:1px;
  background:repeating-linear-gradient(90deg,var(--line-2) 0 6px,transparent 6px 12px)}
.s-step:last-child::after{display:none}

/* ---------- 机构版（深色块） ---------- */
.s-org{background:var(--ink);color:#FFF3E2;border-radius:26px;padding:clamp(26px,4vw,52px);position:relative;overflow:hidden}
.s-org::before{content:"";position:absolute;right:-90px;top:-110px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(232,134,60,.34),transparent 70%)}
.s-org-in{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(20px,4vw,48px);align-items:center}
.s-org h2{margin:0;font-size:clamp(24px,3vw,34px);line-height:1.32;font-weight:800;letter-spacing:-.01em}
.s-org p{margin:14px 0 0;font-size:14.5px;line-height:1.95;color:rgba(255,243,226,.76)}
.s-org .tag2{display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:.14em;color:var(--butter);margin-bottom:12px}
.s-org-list{display:grid;grid-template-columns:1fr 1fr;gap:10px 18px;margin:0;padding:0;list-style:none}
.s-org-list li{font-size:13.5px;line-height:1.7;color:rgba(255,243,226,.9);display:flex;gap:8px;align-items:flex-start}
.s-org-list li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--butter);margin-top:.6em;flex:0 0 auto}
.s-org-act{display:flex;flex-direction:column;gap:10px;align-items:stretch;width:100%;max-width:330px;margin:0 auto}
.s-org .btn.ghost{background:transparent;border-color:rgba(255,243,226,.34);color:#FFF3E2}
.s-org .btn.ghost:hover{background:rgba(255,243,226,.1);border-color:rgba(255,243,226,.6);color:#FFF9F0}
.s-org-act .btn.lg{width:100%;justify-content:center}
.s-org-note{margin:0;font-size:11.5px;color:rgba(255,243,226,.55);line-height:1.7;text-align:center}

/* ---------- FAQ ---------- */
.s-faq{display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(20px,4vw,56px);align-items:start}
.s-faq-list{display:flex;flex-direction:column;gap:10px}
.s-faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:.18s}
.s-faq-item[open]{border-color:#F0CFA8;box-shadow:0 16px 34px -28px rgba(93,64,38,.8)}
.s-faq-item summary{list-style:none;cursor:pointer;padding:15px 18px;font-size:14px;font-weight:700;display:flex;
  align-items:center;gap:12px}
.s-faq-item summary::-webkit-details-marker{display:none}
.s-faq-item summary::after{content:"";margin-left:auto;width:8px;height:8px;border-right:1.8px solid var(--muted);
  border-bottom:1.8px solid var(--muted);transform:rotate(45deg);transition:.2s;flex:0 0 auto}
.s-faq-item[open] summary::after{transform:rotate(-135deg);border-color:var(--brand)}
.s-faq-item .a{padding:0 18px 16px;font-size:13.5px;line-height:1.9;color:var(--ink-2)}
.s-faq-item .a p{margin:0}

/* ---------- 收尾 CTA ---------- */
.s-final{position:relative;overflow:hidden;border-radius:26px;padding:clamp(30px,5vw,64px);text-align:center;
  background:linear-gradient(135deg,#FFF3DF,#FFE7C8 60%,#FFDDB4);border:1px solid #F2D7B4}
.s-final h2{margin:0;font-size:clamp(25px,3.4vw,38px);font-weight:800;letter-spacing:-.01em;line-height:1.34}
.s-final p{margin:12px auto 0;max-width:34em;font-size:14.5px;line-height:1.9;color:var(--ink-2)}
.s-final .s-cta{justify-content:center;margin-top:26px}
.s-final .btn.ghost{background:rgba(255,255,255,.72);border-color:rgba(160,110,50,.32);color:#6B4E32}
.s-final .btn.ghost:hover{background:#fff;border-color:var(--brand);color:var(--brand-deep)}
.s-final .star{position:absolute;color:rgba(226,124,48,.55);opacity:.85}

/* ---------- 页脚 ---------- */
.s-foot{border-top:1px solid var(--line);margin-top:clamp(24px,4vw,56px);padding:clamp(30px,4vw,52px) 0 34px}
.s-foot-in{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:clamp(18px,3vw,40px)}
.s-foot-brand{display:flex;align-items:flex-start;gap:11px;max-width:290px}
.s-foot-brand img{width:36px;height:36px;border-radius:11px;flex:0 0 auto;box-shadow:0 4px 12px rgba(120,64,20,.16)}
.s-foot-brand b{font-size:15px;font-weight:800;display:block}
.s-foot-brand p{margin:7px 0 0;font-size:12.5px;line-height:1.85;color:var(--muted)}
.s-foot-col h4{margin:0 0 12px;font-size:12px;letter-spacing:.1em;color:var(--muted);font-weight:800}
.s-foot-col a{display:block;text-decoration:none;color:var(--ink-2);font-size:13px;padding:4px 0;font-weight:600}
.s-foot-col a:hover{color:var(--brand-deep)}
.s-foot-bottom{display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:space-between;align-items:center;
  margin-top:clamp(24px,3.4vw,40px);padding-top:18px;border-top:1px solid var(--line);font-size:11.5px;color:var(--muted)}
.s-foot-bottom span{line-height:1.8}

/* =============================================================
 * V2.5 阅读价值 / 启蒙关键 / 设计取舍 / 对照表
 * ============================================================= */

/* ---------- 通用：大引言、强调条 ---------- */
.s-quote{margin:0;font-size:clamp(15.5px,1.8vw,20px);line-height:1.92;color:var(--ink);font-weight:600;
  border-left:3px solid var(--brand);padding:2px 0 2px clamp(14px,2vw,20px)}
.s-quote b{color:var(--brand-deep);font-weight:800}
.s-turn{margin:clamp(22px,3vw,34px) 0 0;padding:clamp(18px,2.6vw,26px) clamp(20px,3vw,32px);border-radius:18px;
  background:linear-gradient(120deg,#FFF7EA,#FFEFD9);border:1px dashed #E9C79B;
  font-size:clamp(14.5px,1.7vw,17px);line-height:1.9;color:var(--ink);font-weight:600}
.s-turn b{color:var(--brand-deep);font-weight:800}

/* ---------- 阅读价值 ---------- */
.s-value-head{display:grid;grid-template-columns:1.02fr .98fr;gap:clamp(20px,4vw,52px);align-items:center}
.s-chain{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(10px,1.6vw,18px);margin-top:clamp(30px,4vw,52px)}
.s-chain-i{position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:clamp(15px,1.9vw,22px);box-shadow:0 14px 34px -32px rgba(93,64,38,.9)}
.s-chain-i:not(:last-child)::after{content:"";position:absolute;right:calc(-1 * clamp(10px,1.6vw,18px));top:58px;
  width:clamp(10px,1.6vw,18px);height:1px;background:var(--line-2)}
.s-chain-i .age{display:inline-block;font-size:10.5px;font-weight:800;letter-spacing:.08em;color:var(--brand-deep);
  background:var(--brand-soft);border-radius:6px;padding:3px 8px}
.s-chain-i h3{margin:11px 0 6px;font-size:15.5px;font-weight:800;letter-spacing:-.01em}
.s-chain-i p{margin:0;font-size:12.5px;line-height:1.82;color:var(--ink-2)}
.s-valgrid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(12px,2vw,20px);margin-top:clamp(20px,2.8vw,32px)}
.s-val-card{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start;background:#fff;
  border:1px solid var(--line);border-radius:18px;padding:clamp(17px,2.3vw,24px);transition:.22s}
.s-val-card:hover{border-color:#F0CFA8;transform:translateY(-2px)}
.s-val-ic{width:36px;height:36px;border-radius:11px;background:var(--paper-2);display:flex;align-items:center;
  justify-content:center;color:var(--brand-deep);flex:0 0 auto}
.s-val-ic svg{width:19px;height:19px;display:block}
.s-val-card h3{margin:2px 0 7px;font-size:15.5px;font-weight:800;line-height:1.5}
.s-val-card p{margin:0;font-size:13px;line-height:1.88;color:var(--ink-2)}
.s-val-card p b{color:var(--ink);font-weight:700}

/* ---------- 启蒙关键：拼音 / 英语听力 ---------- */
.s-early{display:grid;grid-template-columns:1fr 1fr;gap:clamp(14px,2.4vw,26px);margin-top:clamp(28px,4vw,48px)}
.s-early-card{position:relative;display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:22px;padding:clamp(20px,2.8vw,32px);overflow:hidden;box-shadow:0 20px 50px -42px rgba(93,64,38,.95)}
.s-early-card::before{content:"";position:absolute;left:0;right:0;top:0;height:4px;
  background:linear-gradient(90deg,var(--brand),var(--butter))}
.s-early-card.en::before{background:linear-gradient(90deg,#6E9F86,#B7D2BE)}
.s-e-tag{display:inline-flex;align-items:center;gap:7px;width:fit-content;font-size:11.5px;font-weight:800;
  letter-spacing:.1em;color:var(--brand-deep);background:var(--brand-soft);border-radius:999px;padding:5px 12px}
.s-early-card.en .s-e-tag{color:#3F6B54;background:var(--sage-soft)}
.s-early-card h3{margin:14px 0 0;font-size:clamp(18.5px,2.15vw,23px);font-weight:800;line-height:1.45;letter-spacing:-.01em}
.s-e-core{margin:10px 0 0;font-size:13.5px;line-height:1.9;color:var(--ink-2)}
.s-e-pts{margin:16px 0 0;padding:0;list-style:none;display:flex;flex-direction:column;gap:11px}
.s-e-pts li{position:relative;padding-left:26px;font-size:13px;line-height:1.88;color:var(--ink-2)}
.s-e-pts li b{color:var(--ink);font-weight:800}
.s-e-pts li .n{position:absolute;left:0;top:.18em;width:17px;height:17px;border-radius:50%;
  background:var(--brand-soft);color:var(--brand-deep);font-size:10.5px;font-weight:800;
  display:flex;align-items:center;justify-content:center}
.s-early-card.en .s-e-pts li .n{background:var(--sage-soft);color:#3F6B54}
.s-wrong{margin:18px 0 0;padding:13px 15px;border-radius:12px;background:#FFF4EF;border:1px solid #F6D8C9;
  font-size:12.5px;line-height:1.85;color:#8A4A2C}
.s-wrong b{display:block;font-size:11px;letter-spacing:.1em;margin-bottom:5px;color:#B4552C}
.s-do-t{margin:20px 0 0;font-size:11px;font-weight:800;letter-spacing:.12em;color:var(--muted)}
.s-do{margin:9px 0 0;padding:0;list-style:none;display:flex;flex-direction:column;gap:8px}
.s-do li{position:relative;padding-left:19px;font-size:12.5px;line-height:1.86;color:var(--ink-2)}
.s-do li b{color:var(--ink);font-weight:700}
.s-do li::before{content:"";position:absolute;left:2px;top:.62em;width:7px;height:7px;border-radius:2px;
  background:var(--brand);transform:rotate(45deg)}
.s-early-card.en .s-do li::before{background:var(--sage)}
.s-honest{margin:16px 0 0;padding:12px 14px;border-radius:12px;border:1px dashed var(--line-2);
  background:var(--paper-2);font-size:12px;line-height:1.85;color:var(--ink-2)}
.s-honest b{color:var(--ink);font-weight:800}

/* ---------- 设计取舍 ---------- */
.s-picks{display:grid;grid-template-columns:1fr 1fr;gap:clamp(12px,2vw,20px);margin-top:clamp(26px,3.4vw,42px)}
.s-pick{background:#fff;border:1px solid var(--line);border-radius:18px;padding:clamp(17px,2.3vw,26px);transition:.22s}
.s-pick:hover{border-color:#F0CFA8;transform:translateY(-2px)}
.s-pick .no{display:inline-flex;align-items:center;gap:6px;font-size:11px;font-weight:800;letter-spacing:.06em;
  color:#9A6248;background:#FDF0E8;border-radius:999px;padding:4px 11px}
.s-pick .no i{font-style:normal;width:14px;height:14px;border-radius:50%;background:#E9A98C;color:#fff;
  font-size:10px;display:flex;align-items:center;justify-content:center;line-height:1}
.s-pick h3{margin:12px 0 8px;font-size:16px;font-weight:800;line-height:1.55}
.s-pick p{margin:0;font-size:13px;line-height:1.9;color:var(--ink-2)}
.s-pick p+p{margin-top:8px}
.s-pick .so{color:var(--brand-deep);font-weight:800}

/* ---------- 对照表 ---------- */
.s-cmp{margin-top:clamp(28px,4vw,44px);border:1px solid var(--line);border-radius:20px;overflow:hidden;background:#fff}
.s-cmp table{width:100%;border-collapse:collapse;font-size:13.5px}
.s-cmp th,.s-cmp td{padding:13px clamp(12px,1.8vw,20px);text-align:left;vertical-align:top;line-height:1.8}
.s-cmp thead th{background:var(--paper-2);font-size:11.5px;letter-spacing:.09em;color:var(--muted);font-weight:800}
.s-cmp thead th.us{background:var(--brand-soft);color:var(--brand-deep);letter-spacing:.09em}
.s-cmp tbody tr+tr th,.s-cmp tbody tr+tr td{border-top:1px solid var(--line)}
.s-cmp tbody th{font-weight:800;color:var(--ink);white-space:nowrap;width:14%;font-size:13px}
.s-cmp td.old{color:var(--muted)}
.s-cmp td.us{color:var(--ink);font-weight:600;background:rgba(255,247,235,.55)}
.s-cmp td.us b{color:var(--brand-deep);font-weight:800}

/* ---------- 进场动效 ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media(max-width:980px){
  /* 六项导航在窄桌面/平板上会顶到按钮，低于 980 一律收进汉堡 */
  .s-menu{display:none}
  .s-menu.open{display:flex;position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;
    background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:var(--shadow-lg);gap:2px}
  .s-menu.open a{padding:12px 14px;border-radius:12px;font-size:15px}
  .s-burger{display:flex}
  .s-nav-act{margin-left:auto}
  .s-burger{margin-left:10px}
  .s-hero-in{grid-template-columns:1fr;gap:34px}
  .s-hero-art{min-height:0;margin:6px 0 10px}
  .s-book{width:min(400px,88vw)}
  .s-tap.t1{left:-3%}
  .s-tap.t2{right:-2%}
  .s-row,.s-row.rev{grid-template-columns:1fr;gap:18px}
  .s-row.rev .s-row-art{order:0}
  .s-row-art{padding-top:62.5%}
  .s-idea{grid-template-columns:1fr 1fr}
  .s-value-head{grid-template-columns:1fr;gap:22px;align-items:start}
  .s-chain{grid-template-columns:1fr 1fr;gap:12px}
  .s-chain-i:not(:last-child)::after{display:none}
  .s-early{grid-template-columns:1fr;gap:16px}
  .s-picks{grid-template-columns:1fr;gap:12px}
  .s-faq{grid-template-columns:1fr}
  .s-org-in{grid-template-columns:1fr;gap:24px}
  .s-foot-in{grid-template-columns:1fr 1fr}
  .s-stats-in{grid-template-columns:1fr 1fr;gap:18px 0}
  .s-stat:nth-child(3)::before{display:none}
  .s-stat:nth-child(3){border-top:1px solid var(--line);padding-top:18px}
  .s-stat:nth-child(4){border-top:1px solid var(--line);padding-top:18px}
}
@media(max-width:760px){
  .s-menu{display:none}
  .s-menu.open{display:flex;position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;
    background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:var(--shadow-lg);gap:2px}
  .s-menu.open a{padding:12px 14px;border-radius:12px;font-size:15px}
  .s-burger{display:flex}
  .s-nav-act{margin-left:0}
  .s-nav-act .btn.ghost{display:none}
  .s-nav-act .btn{font-size:12.5px;padding:8px 14px}
  .s-nav-act{gap:6px;margin-right:2px}
  .s-nav-in{height:64px;gap:10px}
  .s-brand img{width:32px;height:32px;border-radius:10px}
  .s-brand b{font-size:15px}
  .s-brand i{font-size:8.5px;letter-spacing:.12em}
  .s-hero{padding-top:24px}
  .s-hero h1{font-size:clamp(32px,8.6vw,42px)}
  .s-lead{font-size:14.5px;line-height:1.9}
  .s-cta{gap:10px}
  .s-site .btn.lg{padding:13px 22px;font-size:14.5px;flex:1 1 auto}
  .s-book{width:min(340px,86vw)}
  .s-tap{font-size:11.5px;padding:6px 11px 6px 8px}
  .s-tap.t1{left:3%;bottom:12%}
  .s-tap.t2{right:4%;top:30%}
  .s-art-note{display:none}
  .s-idea{grid-template-columns:1fr}
  .s-chain{grid-template-columns:1fr}
  .s-chain-i:not(:last-child)::after{display:block;right:auto;left:50%;top:auto;bottom:-13px;
    width:1px;height:12px;transform:translateX(-50%)}
  .s-chain-i h3{font-size:15px}
  .s-valgrid{grid-template-columns:1fr}
  .s-val-card{grid-template-columns:1fr;gap:10px}
  .s-val-ic{width:32px;height:32px;border-radius:10px}
  .s-early-card{border-radius:18px}
  .s-quote{font-size:14.5px;line-height:1.9}
  .s-turn{font-size:14px}
  /* 对照表在小屏转成卡片，不横向滚动 */
  .s-cmp{border:0;background:transparent;border-radius:0}
  .s-cmp table,.s-cmp tbody,.s-cmp tr,.s-cmp th,.s-cmp td{display:block;width:auto}
  .s-cmp thead{display:none}
  .s-cmp tbody tr{background:#fff;border:1px solid var(--line);border-radius:16px;padding:13px 15px;margin-bottom:10px}
  .s-cmp tbody th{width:auto;font-size:14px;margin-bottom:6px;white-space:normal}
  .s-cmp tbody td{padding:0;border:0!important;background:transparent!important;font-weight:400}
  .s-cmp td.old{color:var(--muted);font-size:12.5px}
  .s-cmp td.old::before{content:"常见做法 · ";font-weight:800;color:#B49B84}
  .s-cmp td.us{margin-top:7px;font-size:12.5px}
  .s-cmp td.us::before{content:"奇妙绘本 · ";color:var(--brand-deep);font-weight:800}
  .s-books{--bgap:12px}
  .s-book-card{flex:0 0 calc((100% - var(--bgap)) / 2);padding:9px;border-radius:16px}
  .s-bc-tx h3{font-size:13.5px}
  .s-bc-tx p{font-size:11px}
  .s-steps{grid-template-columns:1fr;gap:22px}
  .s-step::after{left:0;top:auto;bottom:-11px;width:100%;height:1px}
  .s-step .n{width:40px;height:40px;font-size:15px}
  .s-org-list{grid-template-columns:1fr}
  .s-final{border-radius:20px}
  .s-foot-in{grid-template-columns:1fr 1fr;gap:22px}
  .s-foot-brand{grid-column:1/-1;max-width:100%}
  .s-foot-bottom{flex-direction:column;align-items:flex-start;gap:6px}
}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .s-tap{animation:none}
}