:root{--font-ui: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-serif: "Iowan Old Style", "Songti SC", "Noto Serif SC", Georgia, serif;--font-logo: "Courier New", Courier, monospace;--font-script: "Apple Chancery", "Snell Roundhand", "Palatino Linotype", "Book Antiqua", Georgia, "Times New Roman", serif;--paper: #f8f3ea;--paper-deep: #efe5d5;--ink: #1e1b18;--muted: #6d6257;--soft: #9b8f80;--line: #ded1bf;--line-strong: #c9b9a5;--coast: #5f7880;--wave: #9cafb4;--warm: #8d6f50;--white: #fffaf2;--shadow: 0 16px 44px rgba(66, 48, 30, .045)}*{box-sizing:border-box}html{background:var(--paper);color:var(--ink);font-family:var(--font-ui);text-rendering:optimizeLegibility}body{margin:0;min-width:320px;background:linear-gradient(180deg,#fffaf2d1,#f8f3ea00),var(--paper)}a{color:inherit;text-decoration:none}a:focus-visible,button:focus-visible{outline:2px solid var(--coast);outline-offset:4px}.site-shell{width:min(1160px,calc(100% - 40px));margin:0 auto}.site-header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:26px 0 18px}.brand{display:inline-flex;flex-direction:column;gap:2px;width:fit-content}.brand-mark{font-family:var(--font-logo);font-size:1.3rem;font-weight:700;letter-spacing:0;line-height:1}.brand-subtitle{color:var(--warm);font-family:var(--font-script);font-size:.87rem;font-style:italic;line-height:1.1}.nav-actions{display:flex;align-items:center;gap:10px}.icon-link,.language-link{display:inline-flex;align-items:center;justify-content:center;min-height:42px;border:1px solid var(--line);background:#fffaf28a;color:var(--ink);transition:border-color .16s ease,background .16s ease,transform .16s ease}.icon-link{width:42px;border-radius:999px}.language-link{border-radius:999px;padding:0 16px;font-size:.94rem;font-weight:650}.icon-link:hover,.language-link:hover{border-color:var(--line-strong);background:var(--white);transform:translateY(-1px)}.hero{display:grid;grid-template-columns:minmax(0,.98fr) minmax(320px,.9fr);align-items:center;gap:clamp(32px,6vw,76px);min-height:540px;padding:46px 0 70px}.hero-copy{max-width:590px}.eyebrow{margin:0 0 18px;color:var(--warm);font-size:.76rem;font-weight:800;letter-spacing:.08em;line-height:1.2;text-transform:uppercase}h1,h2,p{margin-top:0}h1{margin-bottom:26px;font-weight:740;letter-spacing:0;line-height:1.04;white-space:pre-line}.hero-title-zh{max-width:520px;font-size:clamp(3rem,6vw,4.9rem)}.hero-title-en{display:grid;gap:.02em;max-width:600px;font-size:clamp(2.45rem,4.15vw,3.85rem);line-height:1.06}.hero-keyword{display:inline-block;min-width:2.25em;animation:keyword-in .52s ease both;vertical-align:baseline}.hero-title-en .hero-keyword{min-width:0}.word-accent-a{color:var(--coast)}.word-accent-b{color:var(--warm)}.hero-dynamic-token{display:inline-flex;align-items:baseline;min-width:5.45em;white-space:nowrap}.hero-period{animation:none;color:var(--ink);transition:none}@keyframes keyword-in{0%{opacity:0;transform:translateY(.12em)}to{opacity:1;transform:translateY(0)}}.hero-body{display:grid;gap:14px;max-width:570px}.serif-copy{color:#40382f;font-family:var(--font-serif);font-size:clamp(1.05rem,1.18vw,1.2rem);line-height:1.78}.hero-body p{margin-bottom:0;white-space:pre-line}.hero-visual{position:relative;min-height:405px;justify-self:end;width:min(100%,520px)}.hero-visual svg{position:relative;display:block;width:100%;height:auto;overflow:visible}.sketch-line{fill:none;stroke-linecap:round;stroke-linejoin:round}.coastline-line{stroke:var(--coast);stroke-width:12.5;stroke-dasharray:520;stroke-dashoffset:520;animation:draw-line 1.7s cubic-bezier(.66,0,.23,1) .12s forwards}.paper-line{stroke:#9b8f80b8;stroke-width:5.5;stroke-dasharray:210;stroke-dashoffset:210;animation:draw-line 1.08s cubic-bezier(.66,0,.23,1) forwards}.paper-one{animation-delay:.36s}.paper-two{animation-delay:.45s}.paper-three{animation-delay:.54s}.paper-four{animation-delay:.63s}.paper-five{animation-delay:.72s}.wave-line{stroke:#9cafb4ad;stroke-width:4.5;stroke-dasharray:280;stroke-dashoffset:280;animation:draw-line 1.32s cubic-bezier(.66,0,.23,1) forwards}.wave-one{animation-delay:.52s}.wave-two{animation-delay:.66s}.wave-three{animation-delay:.8s}@keyframes draw-line{to{stroke-dashoffset:0}}.download-section{display:grid;grid-template-columns:.58fr 1fr;gap:clamp(28px,5vw,72px);padding:46px 0 48px;border-top:1px solid rgba(222,209,191,.62)}.section-heading h2,.privacy-section h2{margin-bottom:0;font-size:clamp(1.75rem,3vw,2.7rem);font-weight:720;letter-spacing:0;line-height:1.08}.download-content{color:var(--muted);font-size:1.04rem;line-height:1.7}.download-content>p{max-width:720px;margin-bottom:24px}.button-row{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:18px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;border:1px solid transparent;border-radius:999px;padding:0 20px;font-size:.96rem;font-weight:760;line-height:1.1;transition:border-color .16s ease,background .16s ease,color .16s ease,transform .16s ease}.button:hover{transform:translateY(-1px)}.button-primary{background:var(--ink);color:var(--white)}.button-secondary{border-color:var(--line-strong);background:var(--white);color:var(--ink)}.button-quiet{border-color:transparent;color:var(--coast)}.button-secondary:hover,.button-quiet:hover{border-color:var(--line-strong);background:var(--white)}.download-note{color:var(--soft);font-size:.9rem;line-height:1.65}.feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;padding:58px 0}.feature-card{min-height:190px;border:1px solid rgba(222,209,191,.36);border-radius:8px;background:#fffaf261;padding:26px;box-shadow:none}.feature-card h2{margin-bottom:34px;font-size:1.08rem;font-weight:760;letter-spacing:0;line-height:1.25}.feature-card p{margin-bottom:0;color:var(--muted);font-size:1rem;line-height:1.7}.privacy-section{display:grid;grid-template-columns:.7fr 1fr;gap:clamp(28px,5vw,72px);padding:46px 0 74px;border-top:1px solid rgba(222,209,191,.62)}.privacy-section .serif-copy{margin-bottom:0}.site-footer{display:grid;grid-template-columns:minmax(250px,1.1fr) repeat(3,minmax(130px,.7fr));gap:34px;padding:38px 0 34px;border-top:1px solid rgba(222,209,191,.62);color:var(--muted)}.footer-brand p{max-width:260px;margin:18px 0 0;font-size:.96rem;line-height:1.65}.footer-column h2{margin-bottom:14px;color:var(--ink);font-size:.78rem;font-weight:800;letter-spacing:.08em;line-height:1.2;text-transform:uppercase}.footer-links{display:grid;gap:10px}.footer-column a,.footer-bottom{font-size:.93rem;line-height:1.55}.footer-column a:hover{color:var(--ink)}.footer-bottom{display:flex;grid-column:1 / -1;justify-content:space-between;gap:36px;align-items:flex-start;padding-top:18px;border-top:1px solid rgba(222,209,191,.5)}.footer-bottom p{margin-bottom:0}.footer-legal{display:grid;gap:10px;min-width:min(100%,560px);text-align:right}.footer-copyright{white-space:nowrap}.footer-motto{display:grid;gap:2px}.footer-motto-primary{color:var(--muted);font-size:.92rem}.footer-motto-thanks{color:var(--soft);font-size:.82rem}@media(max-width:860px){.site-shell{width:min(100% - 28px,720px)}.site-header{padding-top:20px}.hero,.download-section,.privacy-section{grid-template-columns:1fr}.hero{min-height:0;padding:36px 0 52px;gap:24px}.hero-title-zh{font-size:clamp(2.75rem,11vw,4.25rem)}.hero-title-en{max-width:560px;font-size:clamp(2.25rem,8.5vw,3.25rem)}.hero-visual{min-height:0;justify-self:start;max-width:520px}.download-section{padding:38px 0}.feature-grid{grid-template-columns:1fr;padding:46px 0}.feature-card{min-height:0}.feature-card h2{margin-bottom:24px}.site-footer{grid-template-columns:1fr}.footer-bottom{flex-direction:column}.footer-legal{min-width:0;text-align:left}.footer-copyright{white-space:normal}}@media(max-width:560px){.site-header{align-items:flex-start}.brand-subtitle{max-width:170px}.nav-actions{gap:8px}.language-link{padding:0 12px}.serif-copy{font-size:1.03rem;line-height:1.78}.button-row{flex-direction:column;align-items:stretch}.button{width:100%;padding:0 16px}.hero-visual{margin-inline:-10px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important}.coastline-line,.wave-line,.paper-line{animation:none;stroke-dashoffset:0}.hero-keyword{animation:none}}
