*,*::before,*::after{box-sizing:border-box;}
    html{width:100%;overflow-x:hidden;scroll-behavior:smooth;}
    body{
      width:100%;
      margin:0;
      overflow-x:hidden;
      background:#FAF7F0;
      color:#111827;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
      line-height:1.6;
    }
    img,video,iframe,embed{max-width:100%;height:auto;display:block;}
    a{text-decoration:none;color:inherit;transition:all 0.2s ease;}

    :root {
      --bg-warm: #FAF7F0;
      --bg-card: #FFFFFF;
      --bg-sand: #F3E8D7;
      --text-dark: #111827;
      --text-muted: #64748B;
      --color-primary: #0F766E; 
      --color-accent: rgb(239,68,68); 
      --color-coral: #F97316;
      --border-soft: rgba(31,41,55,.12);
    }

    
    .site-header{
      position:sticky;
      top:0;
      z-index:1000;
      width:100%;
      background:rgba(255,252,245,.88);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(31,41,55,.10);
      box-shadow:0 10px 30px rgba(31,41,55,.05);
    }
    .header-inner{
      width:min(1200px, calc(100% - 32px));
      min-height:72px;
      margin:0 auto;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
    }
    .logo{
      display:inline-flex;
      align-items:center;
      gap:12px;
      min-width:0;
      max-width:100%;
      text-decoration:none;
      flex-shrink:0;
    }
    .logo img{
      display:block;
      height:40px;
      width:auto;
      max-width:150px;
      object-fit:contain;
      flex-shrink:0;
    }
    .logo span{
      display:inline-block;
      font-size:18px;
      font-weight:800;
      line-height:1.2;
      color:#111827;
      white-space:nowrap;
      max-width:190px;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .desktop-nav-wrap{
      flex:1 1 auto;
      min-width:0;
      display:flex;
      justify-content:flex-end;
      overflow:hidden;
    }
    .desktop-nav{
      display:flex;
      align-items:center;
      justify-content:flex-end;
      gap:8px;
      max-width:100%;
      overflow-x:auto;
      overflow-y:hidden;
      -webkit-overflow-scrolling:touch;
      scrollbar-width:none;
      white-space:nowrap;
    }
    .desktop-nav::-webkit-scrollbar{display:none;}
    .desktop-nav a{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:40px;
      padding:0 13px;
      border-radius:999px;
      color:#374151;
      text-decoration:none;
      font-size:14px;
      font-weight:700;
      line-height:1;
      white-space:nowrap;
      flex:0 0 auto;
    }
    .desktop-nav a:hover{
      color:#111827;
      background:rgba(15,118,110,.10);
    }
    .mobile-menu-btn{
      display:none;
      width:44px;
      height:44px;
      border:0;
      border-radius:14px;
      background:rgba(15,118,110,.12);
      align-items:center;
      justify-content:center;
      flex-direction:column;
      gap:5px;
      cursor:pointer;
      flex:0 0 auto;
    }
    .mobile-menu-btn span{
      display:block;
      width:20px;
      height:2px;
      border-radius:99px;
      background:#111827;
    }
    .mobile-nav-mask{
      position:fixed;
      inset:0;
      z-index:1100;
      background:rgba(17,24,39,.42);
      opacity:0;
      visibility:hidden;
      pointer-events:none;
      transition:opacity .25s ease, visibility .25s ease;
    }
    .mobile-drawer{
      position:fixed;
      top:0;
      left:0;
      z-index:1110;
      width:min(86vw, 360px);
      height:100vh;
      height:100dvh;
      max-width:90vw;
      background:#111827;
      color:#FFFDF8;
      transform:translateX(-105%);
      transition:transform .28s ease;
      box-shadow:24px 0 60px rgba(0,0,0,.28);
      display:flex;
      flex-direction:column;
      overflow:hidden;
    }
    .drawer-head{
      min-height:76px;
      padding:16px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      border-bottom:1px solid rgba(255,255,255,.14);
      flex:0 0 auto;
    }
    .drawer-logo img{height:34px;max-width:120px;}
    .drawer-logo span{font-size:16px;max-width:145px;color:#FFFDF8;}
    .drawer-close{
      width:40px;
      height:40px;
      border:0;
      border-radius:14px;
      background:rgba(255,255,255,.10);
      color:#FFFDF8;
      font-size:26px;
      line-height:1;
      cursor:pointer;
      flex:0 0 auto;
    }
    .drawer-body{
      flex:1 1 auto;
      min-height:0;
      overflow-y:auto;
      overflow-x:hidden;
      -webkit-overflow-scrolling:touch;
      padding:14px;
    }
    .drawer-nav{
      display:flex;
      flex-direction:column;
      gap:8px;
    }
    .drawer-nav a{
      display:flex;
      align-items:center;
      width:100%;
      min-height:48px;
      padding:13px 14px;
      border-radius:14px;
      background:rgba(255,255,255,.08);
      color:#FFFDF8;
      text-decoration:none;
      font-size:15px;
      font-weight:700;
      line-height:1.35;
      white-space:normal;
      word-break:break-word;
      overflow-wrap:anywhere;
      border:1px solid rgba(255,255,255,.12);
    }
    .drawer-nav a:hover{
      background:rgba(15,118,110,.24);
    }
    body.drawer-open{overflow:hidden;touch-action:none;}
    body.drawer-open .mobile-nav-mask{opacity:1;visibility:visible;pointer-events:auto;}
    body.drawer-open .mobile-drawer{transform:translateX(0);}
    @media (max-width:900px){
      .header-inner{width:min(100% - 24px, 1200px);min-height:64px;gap:12px;}
      .desktop-nav-wrap,.desktop-nav{display:none !important;}
      .mobile-menu-btn{display:inline-flex !important;}
      .logo img{height:34px;max-width:118px;}
      .logo span{font-size:16px;max-width:145px;}
    }
    @media (max-width:420px){
      .mobile-drawer{width:88vw;}
      .logo span{max-width:118px;}
    }

    
    .hero-section {
      padding: 64px 0 48px;
      background: radial-gradient(circle at 80% 20%, rgba(243, 232, 215, 0.5) 0%, rgba(250, 247, 240, 1) 70%);
      border-bottom: 1px dashed var(--border-soft);
    }
    .hero-container {
      width: min(1200px, calc(100% - 32px));
      margin: 0 auto;
      text-align: center;
    }
    .badge-tab {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: var(--bg-sand);
      border: 1px solid var(--border-soft);
      border-radius: 999px;
      font-size: 13px;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: clamp(32px, 5vw, 54px);
      font-weight: 900;
      line-height: 1.15;
      color: var(--text-dark);
      margin: 0 auto 18px;
      max-width: 900px;
    }
    .hero-subtitle {
      font-size: clamp(16px, 2.2vw, 19px);
      color: var(--text-muted);
      margin: 0 auto 32px;
      max-width: 750px;
    }
    .hero-cta {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 52px;
      padding: 0 32px;
      font-weight: 700;
      border-radius: 12px;
      transition: all 0.2s ease;
    }
    .btn-primary {
      background: var(--color-primary);
      color: #FFFFFF;
    }
    .btn-primary:hover {
      background: #0d635c;
      transform: translateY(-2px);
    }
    .btn-secondary {
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      color: var(--text-dark);
    }
    .btn-secondary:hover {
      background: var(--bg-sand);
      transform: translateY(-2px);
    }

    
    .notebook-desk {
      width: min(1200px, calc(100% - 32px));
      margin: 0 auto;
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      border-radius: 24px;
      box-shadow: 0 20px 40px rgba(17, 24, 39, 0.04);
      padding: 32px;
      position: relative;
    }
    .notebook-desk::before {
      content: '';
      position: absolute;
      left: 24px;
      top: 0;
      bottom: 0;
      width: 2px;
      background: rgba(239, 68, 68, 0.15); 
    }
    .desk-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 2px solid var(--bg-sand);
      padding-bottom: 16px;
      margin-bottom: 24px;
      padding-left: 24px;
    }
    .desk-title {
      font-size: 18px;
      font-weight: 800;
      color: var(--text-dark);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .desk-title::before {
      content: '';
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--color-accent);
    }
    .desk-meta {
      font-size: 13px;
      color: var(--text-muted);
    }
    .notebook-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 32px;
      padding-left: 24px;
    }
    @media (max-width: 900px) {
      .notebook-grid { grid-template-columns: 1fr; }
    }

    
    .comparison-sheet {
      background: #FFFCF5;
      border: 1px solid rgba(15,118,110,.15);
      border-radius: 16px;
      padding: 24px;
    }
    .sheet-title {
      font-size: 16px;
      font-weight: 700;
      margin: 0 0 16px;
      color: var(--color-primary);
    }
    .sheet-row {
      display: flex;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid var(--border-soft);
      font-size: 14px;
    }
    .sheet-row:last-child { border: none; }
    .row-label { font-weight: 600; color: var(--text-dark); }
    .row-value { color: var(--text-muted); text-align: right; }
    .tag-allowed {
      background: #DCFCE7;
      color: #15803D;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 700;
    }

    
    .checklist-module {
      background: #FFFFFF;
      border: 1px solid var(--border-soft);
      border-radius: 16px;
      padding: 24px;
    }
    .checklist-title {
      font-size: 16px;
      font-weight: 700;
      margin: 0 0 16px;
      color: var(--text-dark);
    }
    .check-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 14px;
      font-size: 14px;
    }
    .check-box {
      width: 18px;
      height: 18px;
      border: 2px solid var(--color-primary);
      border-radius: 4px;
      flex-shrink: 0;
      margin-top: 2px;
      position: relative;
    }
    .check-box::after {
      content: '✓';
      position: absolute;
      top: -2px;
      left: 2px;
      font-size: 12px;
      color: var(--color-primary);
      font-weight: bold;
    }
    .check-text { color: var(--text-muted); }
    .check-text strong { color: var(--text-dark); }

    
    .edu-section {
      padding: 80px 0;
      background: #FFFDF8;
      border-bottom: 1px solid var(--border-soft);
    }
    .section-container {
      width: min(1200px, calc(100% - 32px));
      margin: 0 auto;
    }
    .section-head {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-head h2 {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-dark);
    }
    .section-head p {
      color: var(--text-muted);
      max-width: 600px;
      margin: 8px auto 0;
    }
    .edu-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 24px;
    }
    .note-card {
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      border-radius: 16px;
      padding: 28px;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }
    .note-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 24px rgba(17,24,39,0.05);
    }
    .note-card-icon {
      width: 48px;
      height: 48px;
      background: var(--bg-sand);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: var(--color-primary);
      margin-bottom: 20px;
    }
    .note-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin: 0 0 12px;
      color: var(--text-dark);
    }
    .note-card p {
      font-size: 14px;
      color: var(--text-muted);
      margin: 0;
    }

    
    .stream-section {
      padding: 80px 0;
    }
    .article-notebook-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
      gap: 28px;
    }
    @media(max-width: 480px) {
      .article-notebook-grid { grid-template-columns: 1fr; }
    }
    .editorial-card {
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      border-radius: 16px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .editorial-img-wrap {
      aspect-ratio: 16/10;
      background: var(--bg-sand);
      overflow: hidden;
      position: relative;
    }
    .editorial-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .editorial-content {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .editorial-meta {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 12px;
      display: flex;
      gap: 12px;
    }
    .editorial-title {
      font-size: 18px;
      font-weight: 800;
      line-height: 1.4;
      color: var(--text-dark);
      margin: 0 0 10px;
    }
    .editorial-summary {
      font-size: 14px;
      color: var(--text-muted);
      margin: 0 0 20px;
      display: -webkit-box;
      -webkit-line-clamp: 3;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .editorial-footer {
      margin-top: auto;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-top: 1px solid var(--border-soft);
      padding-top: 16px;
    }
    .editorial-tag {
      font-size: 12px;
      font-weight: 700;
      color: var(--color-primary);
      background: rgba(15,118,110,.1);
      padding: 4px 10px;
      border-radius: 4px;
    }
    .editorial-btn {
      font-size: 13px;
      font-weight: 700;
      color: var(--color-primary);
    }

    
    .site-footer{
      position:relative;
      width:100%;
      background:#111827;
      color:#FFFDF8;
      padding:56px 0 24px;
      overflow:hidden;
      border-top:1px solid rgba(255,255,255,.12);
    }
    .site-footer .logo span{color:#FFFDF8;}
    .footer-inner{
      width:min(1200px, calc(100% - 32px));
      margin:0 auto;
      display:grid;
      grid-template-columns:minmax(260px,1.35fr) repeat(3,minmax(150px,1fr));
      gap:28px;
      align-items:start;
    }
    .footer-brand,.footer-column{min-width:0;}
    .footer-brand p{
      margin:16px 0 0;
      color:rgba(255,253,248,.76);
      line-height:1.8;
      font-size:14px;
      word-break:break-word;
      overflow-wrap:anywhere;
    }
    .footer-column h3{
      margin:0 0 14px;
      font-size:15px;
      color:#fff;
    }
    .footer-column ul{
      list-style:none;
      margin:0;
      padding:0;
      display:flex;
      flex-direction:column;
      gap:10px;
    }
    .footer-column a,.footer-column span{
      display:inline;
      color:rgba(255,253,248,.76);
      text-decoration:none;
      font-size:14px;
      line-height:1.55;
      white-space:normal;
      word-break:break-word;
      overflow-wrap:anywhere;
    }
    .footer-column a:hover{color:#fff;}
    .footer-bottom{
      width:min(1200px, calc(100% - 32px));
      margin:32px auto 0;
      padding-top:20px;
      border-top:1px solid rgba(255,255,255,.12);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      color:rgba(255,253,248,.62);
      font-size:13px;
    }
    .footer-bottom p{
      margin:0;
      min-width:0;
      word-break:break-word;
      overflow-wrap:anywhere;
    }
    .footer-bottom a{
      color:rgba(255,253,248,.76);
      text-decoration:none;
      word-break:break-word;
      overflow-wrap:anywhere;
    }
    @media (max-width:900px){
      .footer-inner{grid-template-columns:1fr 1fr;gap:24px;}
      .footer-brand{grid-column:1 / -1;}
      .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
    }
    @media (max-width:640px){
      .footer-inner{grid-template-columns:1fr;}
      .footer-inner,.footer-bottom{width:min(100% - 24px, 1200px);}
    }