/* 示风 · 静态个人主页。无第三方字体、样式库或网络依赖。 */
:root {
  color-scheme: dark;
  --bg: #0a1018;
  --bg-elevated: #101925;
  --panel: #121c28;
  --text: #f0f4f9;
  --muted: #9baabd;
  --dim: #6f8197;
  --blue: #77b9ff;
  --line: rgba(170, 195, 222, .12);
  --radius: 20px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body { margin: 0; font-family: var(--font); background: var(--bg); color: var(--text); -webkit-font-smoothing: antialiased; font-size: 18px; line-height: 1.7; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { cursor: pointer; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, summary:focus-visible { outline: 2px solid var(--blue); outline-offset: 6px; }
::selection { background: #2d669e; color: white; }
img, video { max-width: 100%; }
svg { display: block; }
h1, h2, h3, p { margin: 0; }
.container { width: min(1120px, calc(100% - 96px)); margin-inline: auto; }
.skip-link { position: fixed; left: 20px; top: -100px; z-index: 100; padding: 12px 18px; background: var(--text); color: var(--bg); border-radius: 8px; }
.skip-link:focus { top: 20px; }
.reading-progress { height: 2px; position: fixed; top: 0; left: 0; width: 0; background: var(--blue); z-index: 60; }
.site-header { height: 94px; border-bottom: 1px solid rgba(170, 195, 222, .06); position: relative; z-index: 5; }
.header-inner { display: flex; align-items: center; height: 100%; justify-content: space-between; gap: 20px; }
.brand { display: inline-flex; gap: 10px; align-items: center; font-size: 26px; letter-spacing: .03em; font-weight: 750; white-space: nowrap; }
.brand-symbol { width: 30px; height: 30px; color: var(--blue); }
.brand-dot { color: var(--blue); }
.header-note { color: var(--dim); font-size: 16px; letter-spacing: .13em; margin-left: auto; margin-right: 28px; }
.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.language-toggle { min-width: 48px; min-height: 44px; padding: 7px 10px; border: 1px solid var(--line); border-radius: 30px; background: transparent; color: var(--blue); font-size: 14px; }
.language-toggle:hover { border-color: var(--blue); }
.header-contact { border: 1px solid var(--line); padding: 8px 15px; border-radius: 30px; font-size: 16px; color: #cad7e6; transition: border-color .2s, color .2s; white-space: nowrap; min-height: 44px; display: inline-flex; align-items: center; }
.header-contact span { margin-left: 10px; color: var(--blue); }
.header-contact:hover { border-color: var(--blue); color: white; }
.hero { position: relative; display: grid; grid-template-columns: 1.07fr 1fr; gap: 38px; align-items: center; min-height: 695px; padding-top: 64px; padding-bottom: 102px; }
.eyebrow { display: flex; gap: 10px; align-items: center; font-size: 16px; letter-spacing: .12em; color: #a1b1c4; margin-bottom: 27px; }
.status-dot { display: inline-block; height: 6px; width: 6px; border-radius: 50%; background: var(--blue); flex-shrink: 0; box-shadow: 0 0 9px rgba(91, 163, 239, .28); }
h1 { font-size: 24px; line-height: 1.5; font-weight: 450; letter-spacing: .1em; color: #b4c0d0; }
.hero-name { display: block; font-size: clamp(74px, 8.2vw, 112px); color: var(--text); font-weight: 800; line-height: 1.28; letter-spacing: -.03em; margin: 4px 0 12px -5px; }
html:lang(en) .hero-name { font-size: clamp(50px, 6.5vw, 94px); }
.name-dot { color: var(--blue); margin-left: 7px; }
.hero-role { font-size: 26px; font-weight: 550; letter-spacing: .025em; }
.hero-description { margin-top: 25px; color: var(--muted); line-height: 1.95; font-size: 18px; }
.text-highlight { color: var(--blue); }
.hero-actions { margin-top: 32px; display: flex; gap: 13px; flex-wrap: wrap; }
.button { display: inline-flex; gap: 22px; justify-content: center; align-items: center; min-height: 46px; padding: 10px 22px; border-radius: 50px; border: 1px solid transparent; font-size: 16px; font-weight: 550; transition: transform .2s, background .2s, border-color .2s, box-shadow .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #07172c; background: linear-gradient(110deg, #8ac4ff, #69acfa); box-shadow: 0 8px 24px rgba(43, 113, 186, .13); }
.button-primary:hover { box-shadow: 0 8px 25px rgba(70, 133, 211, .24); }
.button-secondary { background: transparent; color: #c6d3e2; border-color: rgba(176, 197, 221, .27); }
.button-secondary:hover { border-color: var(--blue); background: rgba(119, 185, 255, .04); }
.hero-footnote { font-size: 14px; color: var(--dim); margin-top: 20px; letter-spacing: .04em; }
.hero-visual { position: relative; height: 495px; min-width: 0; isolation: isolate; }
.visual-glow { position: absolute; z-index: -2; inset: -15% 0; background: radial-gradient(ellipse, rgba(24, 71, 115, .35) 0, rgba(17, 50, 83, .12) 42%, transparent 69%); pointer-events: none; }
.visual-grid { position: absolute; z-index: -1; inset: 3% -2%; opacity: .25; background-image: linear-gradient(rgba(140, 184, 235, .11) 1px, transparent 1px), linear-gradient(90deg, rgba(140, 184, 235, .11) 1px, transparent 1px); background-size: 38px 38px; mask-image: radial-gradient(ellipse, black 20%, transparent 69%); }
.portrait-fallback { position: absolute; inset: 20px 0 35px; }
.orbit { position: absolute; border: 1px solid rgba(138, 186, 239, .16); border-radius: 50%; pointer-events: none; }
.orbit-outer { width: 390px; height: 390px; top: 22px; left: 50%; transform: translateX(-50%); }
.orbit-inner { width: 315px; height: 315px; top: 59px; left: 50%; transform: translateX(-50%); border-style: dashed; border-color: rgba(138, 186, 239, .08); }
.orbit-point { position: absolute; background: #6ba8e8; border-radius: 50%; height: 5px; width: 5px; box-shadow: 0 0 18px rgba(120, 180, 243, .5); }
.orbit-point-one { top: 63px; left: 24%; }
.orbit-point-two { top: 376px; right: 27%; width: 3px; height: 3px; }
.visual-kicker { text-align: center; font-size: 14px; letter-spacing: .28em; color: #7895b4; position: absolute; top: 1px; left: 0; right: 0; }
.ai-lettering { font-size: 192px; line-height: 1; font-weight: 800; letter-spacing: -.075em; font-family: Arial, sans-serif; color: rgba(137, 195, 255, .08); -webkit-text-stroke: 1px rgba(167, 209, 255, .3); position: absolute; left: 50%; top: 69px; transform: translateX(-50%) rotate(-8deg); }
.ai-lettering span { display: inline-block; margin-left: 12px; font-size: 92px; -webkit-text-stroke: 0; color: #6b9ed0; vertical-align: top; padding-top: 0; }
.visual-statement { position: absolute; left: 22%; top: 238px; font-size: 36px; font-weight: 600; line-height: 1.5; letter-spacing: .02em; transform: rotate(-5deg); }
.visual-statement span { color: var(--blue); }
.visual-caption { position: absolute; bottom: 6px; left: 22%; color: #7690ae; font-size: 14px; letter-spacing: .12em; }
.tiny-cross { font-size: 19px; color: var(--blue); margin-right: 12px; vertical-align: -1px; }
.visual-corner { position: absolute; height: 17px; width: 17px; border-color: rgba(119, 185, 255, .37); }
.top-left { top: 21px; left: 20px; border-left: 1px solid; border-top: 1px solid; }
.bottom-right { right: 15px; bottom: 18px; border-right: 1px solid; border-bottom: 1px solid; }
.floating-note { position: absolute; bottom: 95px; right: 2px; transform: rotate(5deg); display: flex; gap: 12px; align-items: center; padding: 12px 18px; background: rgba(20, 34, 51, .9); border: 1px solid rgba(150, 192, 237, .16); border-radius: 12px; box-shadow: 0 12px 30px rgba(0, 0, 0, .16); font-size: 16px; }
.spark { font-size: 29px; line-height: 1; color: var(--blue); }
.floating-note small { display: block; font-size: 14px; color: var(--muted); margin-top: 3px; }
.visual-bottom { position: absolute; right: 17px; bottom: 0; color: #7396bc; font-size: 14px; letter-spacing: .07em; }
.visual-bottom span { margin-left: 24px; font-size: 18px; }
.hero-portrait { width: 100%; height: 100%; object-fit: contain; object-position: center bottom; position: relative; z-index: 1; mask-image: linear-gradient(black 84%, transparent 100%); }
.hero-visual.has-portrait .floating-note, .hero-visual.has-portrait .visual-bottom { z-index: 2; }
.scroll-cue { position: absolute; bottom: 32px; left: 0; display: flex; align-items: center; gap: 12px; color: #74869b; font-size: 14px; letter-spacing: .1em; }
.scroll-line { display: inline-block; height: 32px; width: 1px; background: linear-gradient(var(--blue), transparent); }
.scroll-cue > span:last-child { margin-left: 16px; }
.section { padding-block: 80px; border-top: 1px solid var(--line); scroll-margin-top: 0; }
.section-heading { display: flex; justify-content: space-between; align-items: center; margin-bottom: 45px; }
.section-kicker { color: var(--dim); font-size: 14px; font-weight: 500; letter-spacing: .2em; line-height: 1.5; margin-bottom: 10px; }
h2 { font-size: 34px; line-height: 1.3; font-weight: 650; letter-spacing: .025em; }
.heading-dot { color: var(--blue); margin-left: 4px; }
.section-number { color: #617b97; font-family: Arial, sans-serif; font-size: 14px; letter-spacing: .1em; }
.section-about { background: linear-gradient(110deg, #0f1924, #0c131c 75%); }
.about-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 110px; }
.about-copy h3 { font-size: 34px; line-height: 1.7; font-weight: 550; margin-bottom: 23px; }
.about-copy p { color: var(--muted); font-size: 18px; margin-top: 12px; line-height: 1.95; max-width: 490px; }
.signature { display: inline-block; margin-top: 21px; font-family: "KaiTi", "Kaiti SC", var(--font); font-size: 26px; color: #bbcee4; transform: rotate(-4deg); }
.approach-list { padding-top: 5px; }
.approach-item { display: flex; gap: 21px; align-items: center; padding: 24px 0; border-bottom: 1px solid var(--line); }
.approach-item:first-child { padding-top: 18px; }
.approach-item:last-child { border-bottom: 0; }
.approach-icon { flex: 0 0 30px; width: 30px; color: #94b9e0; }
.approach-icon svg { width: 28px; height: 28px; }
.approach-item h3 { font-size: 18px; font-weight: 550; }
.approach-item p { font-size: 16px; margin-top: 5px; color: var(--muted); }
.approach-index { color: #688098; font-size: 14px; margin-left: auto; padding-left: 5px; }
.about-extra { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 32px; }
.about-extra-card { border: 1px solid var(--line); padding: 25px; border-radius: var(--radius); }
.about-extra-card h3 { font-size: 22px; margin-bottom: 12px; }
.about-extra-card p { font-size: 18px; color: var(--muted); }
.about-extra-card p + p { margin-top: 18px; }
.section-work { background: #0c131d; }
.project-card { border: 1px solid var(--line); border-radius: var(--radius); display: grid; grid-template-columns: 1.1fr 1fr; gap: 0; overflow: hidden; background: linear-gradient(135deg, #142130, #111a26 75%); }
.project-preview { background: radial-gradient(ellipse at 50% 50%, rgba(48, 91, 137, .19), rgba(13, 22, 32, .14) 65%); display: flex; align-items: center; justify-content: center; padding: 38px; position: relative; flex-direction: column; min-width: 0; }
.project-demo { width: 100%; border: 1px solid rgba(160, 188, 221, .16); border-radius: 12px; background: #101b29; box-shadow: 0 20px 50px rgba(0, 0, 0, .15); transform: rotate(-3deg); overflow: hidden; transition: transform .3s; }
.project-card:hover .project-demo { transform: rotate(-1deg); }
.demo-topline { display: flex; justify-content: space-between; gap: 10px; padding: 14px 18px; border-bottom: 1px solid var(--line); font-size: 14px; color: #92a9c1; }
.demo-indicator { display: inline-block; height: 5px; width: 5px; background: #7cafdF; border-radius: 50%; margin-right: 7px; vertical-align: 1px; }
.demo-flow { display: flex; align-items: center; justify-content: center; padding: 44px 18px 35px; gap: 20px; }
.demo-source, .demo-output { color: #adc9e7; text-align: center; }
.demo-source svg, .demo-frame { width: 100px; height: 100px; display: grid; place-items: center; background: #142338; border: 1px solid rgba(146, 182, 222, .19); border-radius: 10px; padding: 8px; }
.demo-source > span, .demo-output > span { color: #8fa4ba; font-size: 14px; display: block; margin-top: 12px; }
.demo-frame { color: #93c4fa; background: linear-gradient(135deg, #223e61, #172b46); }
.demo-frame svg { width: 43px; height: 43px; }
.flow-arrow { color: #77b1ed; font-size: 27px; padding-bottom: 29px; }
.demo-bottomline { display: flex; flex-wrap: wrap; gap: 6px 15px; padding: 14px 18px; justify-content: space-between; align-items: center; font-size: 14px; border-top: 1px solid var(--line); color: #89a3be; }
.demo-bottomline > span:last-child { font-size: 14px; color: #758ba3; }
#demo-video { border-radius: 10px; width: 100%; max-width: 300px; aspect-ratio: 9/16; background: #05090e; }
.demo-video-caption { margin-top: 12px; color: var(--muted); font-size: 14px; text-align: center; }
.project-content { padding: 37px 38px 32px 22px; align-self: center; }
.project-status { display: inline-flex; align-items: center; gap: 8px; color: #abcae7; background: rgba(137, 187, 239, .06); border: 1px solid rgba(148, 198, 243, .15); border-radius: 30px; padding: 4px 10px; font-size: 14px; }
.project-status .status-dot { height: 4px; width: 4px; }
.project-content h3 { font-size: 34px; line-height: 1.6; font-weight: 550; margin-top: 19px; }
.project-name { font-size: 18px; font-weight: 500; margin-top: 14px; color: #cbd8e8; }
.project-description { margin-top: 9px; color: var(--muted); font-size: 18px; line-height: 1.95; }
.tags { display: flex; flex-wrap: wrap; gap: 7px; margin: 20px 0 17px; }
.tags span { border: 1px solid rgba(154, 184, 216, .14); border-radius: 5px; padding: 3px 7px; font-size: 14px; color: #a9bfd5; }
.project-details summary { cursor: pointer; list-style: none; display: inline-flex; align-items: center; gap: 30px; color: #9dcbfa; font-size: 14px; padding: 8px 0; }
.project-details summary::-webkit-details-marker { display: none; }
.project-details summary > span { font-size: 17px; line-height: 1; transition: transform .2s; }
.project-details[open] summary > span { transform: rotate(45deg); }
.details-body { font-size: 16px; color: var(--muted); padding: 6px 0 0; }
.details-body p + p { margin-top: 10px; }
.project-screens { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px; padding: 30px 38px 34px; border-top: 1px solid var(--line); }
.project-screen { margin: 0; min-width: 0; }
.project-screen-link { display: block; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: #0a1422; }
.project-screen-link img { display: block; width: 100%; height: auto; }
.project-screen-link > span { display: flex; justify-content: space-between; padding: 11px 14px; border-top: 1px solid var(--line); color: #9dcbfa; font-size: 14px; }
.project-screen-link:hover { border-color: rgba(127, 184, 244, .45); }
.project-screen figcaption { margin-top: 17px; }
.project-screen figcaption strong { font-size: 18px; font-weight: 550; }
.project-screen figcaption p { margin-top: 8px; color: var(--muted); font-size: 16px; line-height: 1.85; }
.project-notice { display: flex; gap: 8px; align-items: center; color: #75879d; font-size: 14px; margin-top: 17px; line-height: 1.65; }
.project-notice svg { height: 15px; width: 15px; flex-shrink: 0; }
.section-contact { background: radial-gradient(ellipse at 82% 100%, rgba(23, 56, 88, .13), transparent 65%); padding-bottom: 85px; }
.contact-layout { display: grid; grid-template-columns: 1.05fr 1fr; gap: 80px; }
.contact-copy h3 { font-size: 44px; line-height: 1.5; font-weight: 550; letter-spacing: -.015em; }
.contact-copy p { font-size: 18px; color: var(--muted); line-height: 1.9; margin-top: 19px; }
.contact-copy .contact-preference { font-size: 14px; color: var(--dim); margin-top: 28px; }
.contact-methods { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-content: center; }
.contact-card { background: #131e2b; border: 1px solid var(--line); padding: 22px 18px; border-radius: 12px; display: flex; flex-direction: column; align-items: flex-start; gap: 15px; color: var(--text); position: relative; text-align: left; min-width: 0; cursor: pointer; transition: transform .2s, border-color .2s, background .2s; }
.contact-card:hover { border-color: rgba(127, 184, 244, .35); transform: translateY(-3px); background: #172434; }
.contact-wechat { border-color: rgba(133, 183, 233, .24); }
.contact-icon { width: 34px; height: 34px; color: #8ebffc; }
.contact-icon svg { width: 100%; height: 100%; }
.contact-wechat .contact-icon { color: #94c5b2; }
.contact-label { display: block; width: 100%; }
.contact-label strong { display: block; font-size: 18px; font-weight: 550; }
.contact-label > span { display: block; margin-top: 5px; font-size: 14px; color: #8299b2; overflow-wrap: anywhere; }
.contact-email-group { display: grid; gap: 10px; min-width: 0; }
.contact-label > .email-priority { color: var(--blue); }
.secondary-email { display: block; padding: 2px 18px; font-size: 14px; color: var(--muted); overflow-wrap: anywhere; }
.secondary-email > span { display: block; }
.secondary-email:hover { color: var(--blue); }
.contact-arrow { position: absolute; top: 20px; right: 18px; color: #809bb7; font-size: 17px; }
.setup-note { grid-column: 1 / -1; font-size: 14px; color: #768aA1; line-height: 1.6; }
.site-footer { display: flex; align-items: center; justify-content: space-between; gap: 15px; border-top: 1px solid var(--line); padding-block: 26px; font-size: 14px; color: #73879f; }
.footer-separator { color: #465f7c; margin-inline: 13px; }
.site-footer a > span { color: #9bb8d7; margin-left: 16px; }
.wechat-dialog { width: min(430px, calc(100% - 36px)); padding: 35px; border: 1px solid rgba(154, 196, 239, .27); border-radius: 20px; background: #121e2c; color: var(--text); box-shadow: 0 30px 120px rgba(0, 0, 0, .5); max-height: calc(100dvh - 40px); overflow: auto; }
.wechat-dialog::backdrop { background: rgba(2, 7, 14, .78); backdrop-filter: blur(7px); }
.wechat-dialog h2 { font-size: 30px; }
.dialog-close { position: absolute; top: 12px; right: 15px; width: 32px; height: 32px; border: 0; color: #afc5df; background: transparent; font-size: 26px; padding: 0; line-height: 1; }
.dialog-intro { font-size: 16px; color: var(--muted); margin-top: 16px; }
.wechat-qr { display: block; width: 224px; height: 224px; object-fit: contain; padding: 10px; border-radius: 10px; background: white; margin: 25px auto 20px; }
.wechat-id-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 22px; padding: 12px 0; border-top: 1px solid var(--line); font-size: 16px; }
.wechat-id-row > span { overflow-wrap: anywhere; }
.wechat-id-row .button { font-size: 14px; min-height: 35px; padding: 6px 15px; }
.dialog-status { margin-top: 12px; padding: 10px 12px; border-radius: 8px; background: #1b3047; color: #c7e2ff; font-size: 16px; }
.dialog-tip { font-size: 14px; color: #8398b0; margin-top: 16px; }
.toast { position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%); padding: 12px 20px; border-radius: 10px; border: 1px solid rgba(133, 181, 233, .3); background: #1b2b3f; box-shadow: 0 8px 25px rgba(0, 0, 0, .35); color: #edf5ff; font-size: 16px; z-index: 100; max-width: calc(100% - 32px); text-align: center; }
/* 仅在 JS 运行且用户未要求减少动态效果时，启用轻微滚动显现。 */
.reveal-ready { opacity: 0; transform: translateY(15px); transition: opacity .6s ease, transform .6s ease; }
.reveal-ready.is-visible { opacity: 1; transform: none; }
@media (min-width: 1500px) { .hero { min-height: 745px; } }
@media (max-width: 1100px) {
  .container { width: calc(100% - 64px); }
  .hero { gap: 15px; min-height: 670px; }
  .hero-visual { height: 455px; }
  .orbit-outer { width: 330px; height: 330px; top: 40px; }
  .orbit-inner { width: 270px; height: 270px; top: 70px; }
  .orbit-point-one { top: 80px; left: 20%; }
  .orbit-point-two { top: 345px; }
  .ai-lettering { font-size: 165px; top: 83px; }
  .ai-lettering span { font-size: 70px; }
  .visual-statement { top: 235px; font-size: 32px; left: 15%; }
  .floating-note { right: -5px; bottom: 68px; padding: 10px 12px; }
  .visual-caption { left: 15%; }
  .about-grid { gap: 65px; }
  .project-preview { padding: 25px; }
  .project-content { padding: 30px 25px 28px 15px; }
  .demo-flow { gap: 13px; padding-inline: 13px; }
  .demo-source svg, .demo-frame { width: 80px; height: 80px; }
  .contact-layout { gap: 50px; }
}
@media (max-width: 800px) {
  .container { width: calc(100% - 44px); }
  .site-header { height: 75px; }
  .header-note { display: none; }
  .hero { grid-template-columns: 1fr 0.9fr; padding-top: 43px; padding-bottom: 83px; min-height: 625px; gap: 8px; }
  .eyebrow { font-size: 13px; letter-spacing: .03em; }
  h1 { font-size: 22px; }
  .hero-name { font-size: 82px; }
  .hero-role { font-size: 24px; }
  .hero-description { font-size: 16px; }
  .hero-actions { gap: 8px; }
  .button { padding: 10px 17px; font-size: 16px; gap: 13px; }
  .hero-footnote { font-size: 13px; }
  .hero-visual { height: 380px; }
  .orbit-outer { width: 270px; height: 270px; top: 35px; }
  .orbit-inner { width: 215px; height: 215px; top: 62px; }
  .orbit-point-one { top: 70px; }
  .orbit-point-two { top: 281px; }
  .ai-lettering { font-size: 135px; top: 76px; }
  .ai-lettering span { font-size: 55px; }
  .visual-kicker { font-size: 13px; letter-spacing: .15em; }
  .visual-statement { top: 198px; font-size: 28px; left: 17%; }
  .floating-note { font-size: 14px; bottom: 27px; right: -2px; padding: 8px 12px; }
  .floating-note small { font-size: 13px; }
  .spark { font-size: 23px; }
  .visual-caption { bottom: 24px; font-size: 13px; left: 10%; }
  .visual-bottom { bottom: -23px; font-size: 13px; }
  .section { padding-block: 60px; }
  .section-heading { margin-bottom: 32px; }
  .about-grid { gap: 40px; }
  .about-copy h3 { font-size: 30px; }
  .about-copy p { font-size: 16px; }
  .about-extra-card p { font-size: 16px; }
  .approach-item { gap: 13px; padding-block: 23px; }
  .approach-item h3 { font-size: 16px; }
  .approach-item p { font-size: 16px; }
  .approach-index { display: none; }
  .project-card { grid-template-columns: 1fr 1fr; }
  .project-preview { padding: 22px; }
  .demo-flow { gap: 10px; padding-block: 40px 30px; }
  .demo-source svg, .demo-frame { height: 68px; width: 68px; }
  .demo-topline { font-size: 13px; padding: 12px; }
  .demo-bottomline { padding: 12px; font-size: 13px; }
  .project-content { padding: 28px 25px 25px 8px; }
  .project-content h3 { font-size: 30px; }
  .project-name { font-size: 16px; }
  .project-description { font-size: 16px; }
  .contact-layout { gap: 35px; }
  .contact-copy h3 { font-size: 36px; }
  .contact-copy p { font-size: 16px; }
  .contact-methods { gap: 10px; }
  .contact-card { padding: 18px 14px; }
}
@media (max-width: 620px) {
  html { scroll-padding-top: 24px; }
  .container { width: calc(100% - 44px); }
  .site-header { height: 72px; }
  .header-inner { gap: 12px; }
  .header-actions { gap: 8px; }
  .brand { font-size: 24px; }
  html:lang(en) .brand { font-size: 20px; gap: 8px; }
  .brand-symbol { width: 26px; height: 26px; }
  .header-contact { font-size: 13px; padding: 7px 12px; }
  .hero { display: flex; flex-direction: column; align-items: stretch; gap: 10px; padding-top: 45px; padding-bottom: 58px; min-height: unset; }
  .hero-copy { position: relative; z-index: 1; }
  .eyebrow { font-size: 13px; margin-bottom: 21px; }
  h1 { font-size: 22px; }
  .hero-name { font-size: 88px; margin-bottom: 8px; line-height: 1.23; }
  html:lang(en) .hero-name { font-size: clamp(54px, 18vw, 80px); }
  .hero-role { font-size: 24px; }
  .hero-description { font-size: 16px; margin-top: 22px; line-height: 1.9; }
  .hero-actions { gap: 12px; margin-top: 26px; }
  .button { min-height: 46px; padding: 10px 20px; font-size: 16px; }
  .hero-footnote { font-size: 13px; margin-top: 17px; }
  .hero-visual { height: 305px; margin-top: 12px; width: 100%; max-width: 410px; align-self: center; }
  .portrait-fallback { inset: 0 0 20px; }
  .visual-grid { inset: -10% -5%; }
  .orbit-outer { width: 267px; height: 267px; top: 7px; }
  .orbit-inner { width: 210px; height: 210px; top: 35px; }
  .orbit-point-one { top: 42px; left: 22%; }
  .orbit-point-two { top: 251px; right: 30%; }
  .visual-kicker { top: 0; right: auto; left: 0; font-size: 13px; text-align: left; }
  .ai-lettering { font-size: 139px; top: 40px; left: 48%; }
  .ai-lettering span { font-size: 60px; }
  .visual-statement { top: 163px; left: 26%; font-size: 28px; }
  .visual-caption { bottom: -8px; font-size: 13px; left: 15%; }
  .visual-corner { height: 12px; width: 12px; }
  .top-left { top: 25px; left: 0; }
  .bottom-right { bottom: 0; right: 0; }
  .floating-note { right: 0; bottom: 47px; font-size: 14px; padding: 8px 10px; gap: 7px; }
  .floating-note small { font-size: 13px; }
  .spark { font-size: 22px; }
  .visual-bottom { right: 0; bottom: -4px; font-size: 13px; }
  .visual-bottom span { font-size: 13px; margin-left: 12px; }
  .scroll-cue { font-size: 13px; bottom: 13px; }
  .scroll-line { height: 20px; }
  .section { padding-block: 48px; }
  h2 { font-size: 30px; }
  .section-heading { margin-bottom: 28px; }
  .section-kicker { font-size: 13px; margin-bottom: 9px; }
  .section-number { font-size: 13px; }
  .about-grid { grid-template-columns: 1fr; gap: 22px; }
  .about-copy h3 { font-size: 30px; line-height: 1.65; margin-bottom: 18px; }
  .about-copy p { font-size: 16px; line-height: 1.95; }
  .signature { margin-top: 18px; font-size: 24px; }
  .approach-list { padding-top: 0; }
  .approach-item, .approach-item:first-child { padding: 18px 0; gap: 18px; }
  .approach-item h3 { font-size: 16px; }
  .approach-item p { font-size: 16px; }
  .approach-index { display: block; font-size: 13px; }
  .about-extra { grid-template-columns: 1fr; }
  .project-card { grid-template-columns: 1fr; border-radius: 16px; }
  .project-preview { padding: 26px 22px 20px; }
  .project-demo { max-width: 400px; transform: rotate(-2deg); }
  .demo-topline { font-size: 13px; padding: 13px 14px; }
  .demo-flow { padding: 30px 16px 25px; gap: 23px; }
  .demo-source svg, .demo-frame { width: 82px; height: 82px; }
  .demo-source > span, .demo-output > span { font-size: 13px; margin-top: 9px; }
  .demo-bottomline { padding: 12px 14px; font-size: 13px; }
  .demo-bottomline > span:last-child { font-size: 13px; }
  .project-content { padding: 21px 23px 25px; }
  .project-content h3 { font-size: 30px; margin-top: 15px; }
  .project-name { font-size: 16px; }
  .project-description { font-size: 16px; }
  .project-status { font-size: 13px; }
  .project-screens { grid-template-columns: 1fr; gap: 25px; padding: 24px 22px 27px; }
  .project-screen figcaption strong { font-size: 16px; }
  .tags { margin-top: 17px; margin-bottom: 11px; }
  .tags span { font-size: 13px; }
  .project-details summary { font-size: 16px; }
  .project-notice { font-size: 13px; align-items: flex-start; margin-top: 14px; }
  .project-notice svg { margin-top: 1px; }
  .contact-layout { grid-template-columns: 1fr; gap: 27px; }
  .contact-copy h3 { font-size: 36px; }
  .contact-copy p { font-size: 16px; margin-top: 15px; }
  .contact-copy .contact-preference { margin-top: 16px; }
  .contact-methods { gap: 12px; }
  .contact-card { padding: 20px 18px; gap: 16px; }
  .contact-icon { height: 32px; width: 32px; }
  .contact-label strong { font-size: 16px; }
  .contact-label > span { font-size: 13px; }
  .setup-note { font-size: 13px; }
  .site-footer { padding-block: 24px; flex-direction: column; align-items: flex-start; font-size: 13px; gap: 8px; }
  .site-footer a { align-self: flex-end; }
  .wechat-dialog { padding: 30px 24px; }
}
@media (max-width: 360px) {
  .container { width: calc(100% - 36px); }
  .hero-role { font-size: 22px; }
  .hero-name { font-size: 80px; }
  .hero-description { font-size: 16px; }
  .hero-actions { gap: 8px; }
  .button { padding: 10px 16px; }
  .floating-note { right: -3px; bottom: 26px; }
  .visual-statement { left: 21%; }
  .demo-flow { gap: 16px; padding-inline: 9px; }
  .demo-source svg, .demo-frame { height: 71px; width: 71px; }
  .demo-bottomline { font-size: 13px; }
  .contact-card { padding-inline: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal-ready { opacity: 1; transform: none; }
}