/* 首页沿用腾讯现站的黑橙色、秋字标记与字体。 */
:root{--dim:#9a9fa8}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
.skip-link{position:fixed;top:8px;left:16px;z-index:150;padding:10px 18px;background:var(--accent);color:#08090b;transform:translateY(-180%)}
.skip-link:focus{transform:none}
html{scroll-behavior:smooth;scroll-padding-top:92px}
[ id ]{scroll-margin-top:92px}
.nav-inner{height:auto;min-height:68px;flex-wrap:wrap;padding-top:14px;padding-bottom:14px;gap:16px}
.nav-links{font-family:var(--sans);letter-spacing:0;font-size:13px;gap:24px}
.nav-cta{margin-left:8px}.nav-cta .btn-solid{font-family:var(--sans)}
.kicker{font-family:var(--mono);font-size:11px;letter-spacing:.13em;color:var(--accent);line-height:1.8;margin-bottom:20px}
.home-hero{border-bottom:1px solid var(--line);background:radial-gradient(ellipse at 82% 5%,#ff5a2b0c,transparent 65%)}
.hero-layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,.8fr);gap:80px;padding-top:76px;padding-bottom:72px;align-items:center}
.hero-copy h1{font-size:clamp(36px,4.5vw,62px);font-weight:600;letter-spacing:-.045em;line-height:1.25;margin:0 0 24px}
.hero-copy h1 em{font-style:normal;color:var(--accent)}
.home-intro{font-size:16px;line-height:1.95;color:var(--muted);max-width:37em}
.hero-actions{display:flex;gap:24px;align-items:center;flex-wrap:wrap;margin-top:30px}
.primary-action{display:inline-flex;gap:30px;align-items:center;background:var(--accent);color:#08090b;padding:12px 20px;font-size:14px;font-weight:600}
.primary-action:hover{filter:brightness(1.12)}
.text-action{font-size:13px;color:var(--fg);line-height:1.7;border-bottom:1px solid var(--line-strong);padding-bottom:3px;width:fit-content}
.text-action:hover{color:var(--accent);border-color:var(--accent)}
.currently{border-left:1px solid var(--line-strong);padding:8px 0 8px 32px}
.currently .kicker{color:var(--dim)}
.currently-title{font-size:25px;line-height:1.5;margin:0 0 18px;font-weight:500;letter-spacing:-.02em}
.currently>p:not(.currently-title){color:var(--muted);font-size:13px;line-height:1.95;margin-bottom:24px}
.home-section{padding:76px 0;border-bottom:1px solid var(--line)}
.home-section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:32px}
.home-section-head .kicker{margin-bottom:10px}
.home-section h2,.contact-section h2{font-size:clamp(26px,3vw,35px);font-weight:500;line-height:1.45;letter-spacing:-.03em}
.featured-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:32px 28px}
.featured-project{min-width:0;background:var(--card);border:1px solid var(--line);display:flex;flex-direction:column}
.project-image{display:block;aspect-ratio:4/3;overflow:hidden;background:var(--panel);border-bottom:1px solid var(--line)}
.project-image img{display:block;width:100%;height:100%;object-fit:contain;transition:transform .3s}
.project-image:hover img{transform:scale(1.025)}
.project-copy{padding:24px 26px 22px;display:flex;flex-direction:column;flex:1}
.project-category{font-size:11px;color:var(--dim);margin-bottom:10px;letter-spacing:.04em}
.featured-project h3{font-size:23px;line-height:1.4;font-weight:500;margin-bottom:12px;letter-spacing:-.02em}
.featured-project h3 a:hover{color:var(--accent)}
.project-summary{font-size:14px;color:var(--muted);line-height:1.85;margin-bottom:12px;flex:1}
.project-note{font-size:12px;color:var(--dim);line-height:1.75;margin-bottom:16px}
.project-actions{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:16px;margin-top:4px;font-size:12px}
.project-actions .project-primary{color:var(--accent)}
.project-actions a:hover{text-decoration:underline;text-underline-offset:4px}
.about-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:90px}
.section-intro{font-size:14px;color:var(--muted);line-height:1.9;max-width:31em;margin:20px 0 26px}
.principles article{display:flex;gap:24px;padding:20px 0;border-top:1px solid var(--line)}
.principles article:first-child{padding-top:0;border-top:0}
.principles article>span{font-family:var(--mono);color:var(--accent);font-size:11px;padding-top:4px}
.principles h3{font-size:17px;font-weight:500;margin-bottom:6px}.principles p{font-size:13px;line-height:1.85;color:var(--muted)}
.contribution-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.contribution{padding:25px 28px;border:1px solid var(--line);transition:border-color .2s}
.contribution:hover{border-color:var(--accent)}
.contribution h3{display:flex;justify-content:space-between;font-family:var(--mono);font-size:20px;font-weight:500;margin-bottom:16px}
.contribution h3 span{color:var(--accent)}
.contribution p{font-size:13px;line-height:1.85;color:var(--muted);margin-bottom:20px}
.contribution-link{font-size:11px;color:var(--accent)}
.more-links{font-size:12px;color:var(--dim);margin-top:24px}.more-links a{color:var(--fg)}
.contact-section{padding:76px 0;background:#ff5a2b05;border-bottom:1px solid var(--line)}
.contact-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:80px;align-items:center}
.contact-section p:not(.kicker){font-size:14px;color:var(--muted);line-height:1.95;margin-top:20px}
.contact-actions{display:flex;flex-direction:column;align-items:flex-start;gap:20px;min-width:0}
.contact-mail{display:flex;justify-content:space-between;gap:18px;align-items:center;border-bottom:1px solid var(--accent);padding-bottom:14px;max-width:100%;font-size:clamp(16px,2vw,23px);color:var(--accent);overflow-wrap:anywhere}
.footer-brand{font-family:var(--sans)}
/* Interior pages keep their desktop navigation visible on small screens too. */
@media(max-width:900px){.hero-layout{gap:40px}.about-layout,.contact-layout{gap:40px}.nav-links{display:flex;gap:18px}.nav-cta{margin-left:auto}.nav-inner{column-gap:18px}.hero-layout{padding-top:52px;padding-bottom:52px}.home-section,.contact-section{padding:60px 0}}
@media(max-width:700px){.wrap{padding-left:22px;padding-right:22px}.nav-inner{padding-left:22px;padding-right:22px;gap:14px}.brand-name em{display:none}.nav-cta{margin-left:auto}.nav-cta .btn-ghost{display:none}.nav-links{display:flex;order:3;flex-basis:100%;margin:0;justify-content:space-between;gap:10px;font-size:12px}.hero-layout,.about-layout,.contact-layout{grid-template-columns:minmax(0,1fr);gap:34px}.hero-layout{padding-top:40px;padding-bottom:40px}.hero-copy h1{font-size:clamp(32px,7.8vw,44px)}.currently{padding:0 0 0 20px}.currently-title{font-size:21px}.currently-title br{display:none}.currently>p:not(.currently-title){margin-bottom:16px}.home-section,.contact-section{padding:44px 0}.home-section-head{align-items:flex-start;flex-direction:column;gap:14px;margin-bottom:24px}.featured-grid,.contribution-grid{grid-template-columns:minmax(0,1fr);gap:24px}.project-copy{padding:22px}.featured-project h3{font-size:21px}.hero-actions{gap:18px}.contact-mail{font-size:clamp(15px,4.7vw,21px)}.home-section h2,.contact-section h2{font-size:28px}.principles article{gap:18px}.contact-actions{gap:18px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}
@media print{.nav,.skip-link{display:none!important}}