:root{
  --paper:#f2e9d3;
  --paper-2:#e8dcc0;
  --ink:#2b251c;
  --ink-2:#5c5345;
  --muted:rgba(43,37,28,.5);
  --red:#b3261e;
  --blue:#1d4e89;
  --line:rgba(43,37,28,.2);
  --card:#ffffff;
  --frame:#ffffff;
  --serif:'Noto Serif SC',serif;
  --display:'Playfair Display',serif;
  --mono:'IBM Plex Mono',monospace;
  --ease:cubic-bezier(.22,1,.36,1);
  --scroll-thumb:#2b251c;
}
[data-theme="dark"]{
  --paper:#1c1812;
  --paper-2:#241f16;
  --ink:#eadfc4;
  --ink-2:#b5a98f;
  --muted:rgba(234,223,196,.6);
  --red:#d0533f;
  --blue:#7aa8d6;
  --line:rgba(234,223,196,.16);
  --card:#292219;
  --frame:#000000;
  --scroll-thumb:#eadfc4;
}
[data-theme="dark"] .topbar{background:#14100b;color:#eadfc4}
[data-theme="dark"] .feature{background:#14100b;color:#eadfc4}
[data-theme="dark"] .feature .sec-head h2{color:#eadfc4}
[data-theme="dark"] .feature .sec-head .en{color:#eadfc4}
[data-theme="dark"] .feature .flag{color:#f2e9d3}
[data-theme="dark"] .feature .btn-paper{color:#f2e9d3}
[data-theme="dark"] .socials a:hover{color:#f2e9d3}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scrollbar-width:thin;scrollbar-color:var(--scroll-thumb) var(--paper)}
body{background:var(--paper);color:var(--ink);font-family:var(--serif);line-height:1.85;overflow-x:hidden;-webkit-font-smoothing:antialiased}
::selection{background:rgba(179,38,30,.2)}
/* 滚动条（随主题配色自动切换） */
::-webkit-scrollbar{width:12px}
::-webkit-scrollbar-track{background:var(--paper)}
::-webkit-scrollbar-thumb{background:var(--scroll-thumb);border:3px solid var(--paper)}
::-webkit-scrollbar-thumb:hover{background:var(--red)}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.container{width:min(1180px,92%);margin:0 auto}
/* 牛皮纸纹理 */
.grain{position:fixed;inset:-50%;z-index:60;pointer-events:none;opacity:.07;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 300 300' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");}

/* 顶部条 */
.topbar{background:var(--ink);color:var(--paper);padding:10px 0;font-family:var(--mono);font-size:.66rem;letter-spacing:.22em}
.topbar .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:6px;align-items:center}
.topbar-actions{display:flex;align-items:center;gap:8px}

/* 导航 / 报头 */
.nav{padding:24px 0 20px;border-bottom:3px double var(--ink)}
.nav-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;position:relative}
.masthead .name{font-family:var(--display);font-weight:900;font-size:clamp(1.8rem,4.4vw,2.8rem);letter-spacing:.24em;line-height:1.1}
.masthead .name em{font-style:normal;color:var(--red)}
.masthead .tagline{font-family:var(--mono);font-size:.64rem;letter-spacing:.3em;color:var(--ink-2);margin-top:4px}
.nav-links{display:flex;gap:24px;list-style:none;font-family:var(--mono);font-size:.72rem;letter-spacing:.16em}
.nav-links a{color:var(--ink-2);transition:.3s;position:relative}
.nav-links a::after{content:'';position:absolute;left:0;bottom:-4px;width:0;height:1px;background:var(--red);transition:width .3s var(--ease)}
.nav-links a:hover{color:var(--red)}
.nav-links a:hover::after{width:100%}
.theme-toggle{display:inline-flex;align-items:center;gap:7px;background:none;border:1px solid currentColor;padding:3px 10px;font-family:var(--mono);font-size:.62rem;letter-spacing:.16em;color:inherit;cursor:pointer;transition:.3s;line-height:1.5}
.theme-toggle svg{width:13px;height:13px;flex:none}
.theme-toggle .icon-sun{display:none}
[data-theme="dark"] .theme-toggle .icon-moon{display:none}
[data-theme="dark"] .theme-toggle .icon-sun{display:block}
.theme-toggle:hover{color:var(--red);border-color:var(--red)}
.lang-toggle{display:inline-flex;align-items:center;background:none;border:1px solid currentColor;padding:3px 10px;font-family:var(--mono);font-size:.62rem;letter-spacing:.16em;color:inherit;cursor:pointer;transition:.3s;line-height:1.5}
.lang-toggle:hover{color:var(--red);border-color:var(--red)}
.burger{display:none;flex-direction:column;gap:4px;background:none;border:none;cursor:pointer}
.burger span{width:24px;height:2px;background:var(--ink)}

/* 头版 Hero */
.frontpage{border-bottom:3px double var(--ink);position:relative;overflow:hidden}
.frontpage-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:44px;padding:52px 0 56px;align-items:center}
.headline-area{border-right:1px solid var(--line);padding-right:44px}
.date-line{font-family:var(--mono);font-size:.7rem;letter-spacing:.22em;color:var(--red);margin-bottom:20px;display:flex;gap:10px;flex-wrap:wrap}
.typewriter h1{
  font-family:var(--display);font-weight:900;font-size:clamp(1.7rem,4vw,2.9rem);line-height:1.4;
  margin-bottom:22px;letter-spacing:.01em;
}
.typewriter h1 .caret{display:inline-block;width:3px;height:1em;background:var(--ink);vertical-align:-.12em;animation:blink .9s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.standfirst{color:var(--ink-2);font-size:.96rem;max-width:560px;margin-bottom:28px;border-left:3px solid var(--red);padding-left:18px}
.meta-row{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.btn-paper{font-family:var(--mono);font-size:.74rem;letter-spacing:.2em;padding:13px 28px;background:var(--ink);color:var(--paper);border:none;cursor:pointer;transition:.3s;display:inline-block}
.btn-paper:hover{background:var(--red);transform:translateY(-2px)}
.btn-paper.outline{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.btn-paper.outline:hover{background:var(--ink);color:var(--paper)}
.hero-img{width:100%;aspect-ratio:16/10;object-fit:cover;filter:sepia(.3) contrast(1.03);border:6px solid var(--frame);box-shadow:9px 9px 0 rgba(43,37,28,.14);transition:.5s var(--ease)}
.hero-img:hover{transform:rotate(-1.5deg) scale(1.01)}
/* 通用区块 */
.section{padding:88px 0;border-bottom:1px solid var(--line)}
.sec-head{display:flex;align-items:center;gap:22px;margin-bottom:40px;font-family:var(--display)}
.sec-head .no{font-size:2.4rem;font-weight:700;color:transparent;-webkit-text-stroke:1.5px var(--red);line-height:1}
.sec-head h2{font-size:clamp(1.4rem,2.8vw,2rem);font-weight:700;letter-spacing:.1em}
.sec-head .rule{flex:1;height:1px;background:var(--line)}
.sec-head .en{font-family:var(--mono);font-size:.62rem;letter-spacing:.24em;color:var(--muted)}
/* 英文界面下隐藏英文副标题（如 ALL TOOLS），避免与主标题重复 */
html[lang="en"] .sec-head .en{display:none}

/* 筛选栏 */
.filter-bar{display:flex;gap:14px;margin-bottom:34px;flex-wrap:wrap;align-items:center}
.search-box{flex:1;min-width:220px;display:flex;align-items:center;gap:10px;background:var(--card);border:1px solid var(--ink);padding:0 16px}
.search-box svg{flex:none;width:16px;height:16px;stroke:var(--ink-2)}
.search-box input{flex:1;border:none;outline:none;background:none;font-family:var(--mono);font-size:.82rem;padding:13px 0;color:var(--ink)}
.filters{display:flex;gap:10px;flex-wrap:wrap}
.filters button{
  font-family:var(--mono);font-size:.7rem;letter-spacing:.12em;padding:10px 18px;
  background:transparent;border:1px solid var(--line);color:var(--ink-2);cursor:pointer;transition:.28s;
}
.filters button:hover{border-color:var(--ink);color:var(--ink)}
.filters button.active{background:var(--ink);color:var(--paper);border-color:var(--ink)}

/* 工具网格 */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px}
.tool{background:var(--card);border:1px solid var(--line);padding:26px 24px 24px;box-shadow:4px 4px 0 rgba(43,37,28,.1);transition:.35s var(--ease);cursor:pointer;display:flex;flex-direction:column;position:relative}
.tool:hover{transform:translate(-4px,-4px);box-shadow:8px 8px 0 var(--red)}
.tool-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.tool .t-icon{width:46px;height:46px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;background:var(--paper);border:1px solid var(--line);box-shadow:2px 2px 0 rgba(43,37,28,.1)}
.badge{font-family:var(--mono);font-size:.6rem;letter-spacing:.14em;padding:4px 10px;border-radius:99px}
.badge.free{background:#e7f0e3;color:#2f6b33;border:1px solid #bcd6b5}
.tool h3{font-size:1.1rem;font-weight:700;margin-bottom:8px}
.tool p{font-size:.83rem;color:var(--ink-2);flex:1}
.tool-meta{display:flex;justify-content:space-between;align-items:center;margin-top:16px;padding-top:14px;border-top:1px dashed var(--line);font-family:var(--mono);font-size:.62rem;letter-spacing:.12em;color:var(--muted)}
.tool-meta .go{color:var(--blue);font-size:.68rem}
.tool:hover .tool-meta .go{color:var(--red)}

/* 精选（墨色区） */
.feature{background:var(--ink);color:var(--paper)}
.feature .sec-head h2{color:var(--paper)}
.feature .sec-head .no{-webkit-text-stroke-color:var(--red)}
.feature .sec-head .en{color:var(--paper)}
.feature .sec-head .rule{background:rgba(242,233,211,.3)}
.feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.feature-img-wrap{position:relative}
.feature img{width:100%;aspect-ratio:1;object-fit:cover;filter:sepia(.3) contrast(1.05);border:8px solid #1d1a14;box-shadow:14px 14px 0 rgba(0,0,0,.4);transition:.5s var(--ease)}
.feature img:hover{transform:translate(4px,4px);box-shadow:10px 10px 0 rgba(0,0,0,.4)}
.feature .flag{position:absolute;top:-14px;left:18px;background:var(--red);color:var(--paper);font-family:var(--mono);font-size:.62rem;letter-spacing:.2em;padding:6px 14px;transform:rotate(-3deg);box-shadow:3px 3px 0 rgba(0,0,0,.35)}
.feature h3{font-family:var(--display);font-size:clamp(1.3rem,2.8vw,1.9rem);font-weight:700;margin-bottom:18px;line-height:1.5}
.feature p{color:rgba(242,233,211,.7);font-size:.9rem;margin-bottom:14px}
.feature .btn-paper{background:var(--red);color:var(--paper);margin-top:8px}
.feature .btn-paper:hover{background:var(--paper);color:var(--ink)}
.feature .byline{font-family:var(--mono);font-size:.66rem;letter-spacing:.2em;color:rgba(242,233,211,.45);margin-top:20px}

/* 联系方式 */
.contact{text-align:center;padding:88px 0 96px}
.contact h2{font-family:var(--display);font-size:clamp(1.5rem,3.2vw,2.2rem);font-weight:700;margin-bottom:14px}
.contact p{color:var(--ink-2);margin-bottom:34px;font-size:.92rem;max-width:520px;margin-left:auto;margin-right:auto}
.socials{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.socials a{font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;border:1px solid var(--line);padding:9px 18px;transition:.3s;background:var(--card)}
.socials a:hover{background:var(--blue);color:var(--paper);border-color:var(--blue);transform:translateY(-3px)}

/* 微信二维码弹窗 */
.modal{position:fixed;inset:0;z-index:80;display:none;align-items:center;justify-content:center;background:rgba(43,37,28,.62)}
.modal.show{display:flex}
.modal-box{background:var(--card);border:8px solid var(--frame);box-shadow:10px 10px 0 rgba(43,37,28,.25);padding:22px;position:relative;text-align:center;width:min(78vw,320px)}
.modal-box img{width:100%;display:block;border:1px solid var(--line)}
.modal-box p{font-family:var(--mono);font-size:.7rem;letter-spacing:.22em;color:var(--ink-2);margin-top:16px}
.modal-close{position:absolute;top:-16px;right:-16px;width:36px;height:36px;border-radius:50%;border:none;background:var(--red);color:#fff;font-size:1.05rem;line-height:1;cursor:pointer;transition:.25s}
.modal-close:hover{transform:rotate(90deg)}

/* 页脚 */
.footer{background:var(--paper-2);border-top:3px double var(--ink);padding:48px 0 36px}
.footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px}
.footer .masthead .name{font-size:1.5rem}
.footer small{font-family:var(--mono);font-size:.64rem;letter-spacing:.2em;color:var(--ink-2)}

/* 显现动画 */
.reveal{opacity:0;transform:translateY(40px);transition:opacity 1s var(--ease),transform 1s var(--ease)}
.reveal.show{opacity:1;transform:translateY(0)}
.reveal.d1{transition-delay:.12s}.reveal.d2{transition-delay:.24s}.reveal.d3{transition-delay:.36s}

@media (max-width:900px){
  .frontpage-inner{grid-template-columns:1fr}
  .headline-area{border-right:none;padding-right:0}
  .feature-grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .nav-links.open{
    display:flex;flex-direction:column;position:absolute;top:100%;right:0;
    width:max-content;min-width:100px;background:var(--paper);padding:16px 22px;border:1px solid var(--line);
    box-shadow:6px 6px 0 rgba(43,37,28,.18);gap:14px;z-index:50;text-align:center;
  }
  .nav-links.open a{color:var(--ink);display:block}
  .burger{display:flex}
}