/**
 * sections.css — 各章节的版式。
 *
 * 版式的共同规律：
 *   · 12 栏网格，文字与粒子占位框（[data-stage-anchor]）分居两侧，逐章左右交替
 *   · 占位框只是一个有尺寸的空盒子：粒子编队会被「装」进去，所以调版式就是调粒子的位置
 *   · 860px 以下全部收成单栏，占位框移到文字上方
 */

@layer sections {
  /* ══ 首屏 ════════════════════════════════════════════════════════════════ */
  .hero {
    position: relative;
    display: grid;
    grid-template-rows: auto 1fr auto;
    gap: clamp(0.75rem, 2.4vh, 1.75rem);
    min-height: 100svh;
    padding: calc(var(--nav-h) + clamp(0.25rem, 1.5vh, 1.25rem)) var(--gutter) clamp(1.25rem, 3.6vh, 2.5rem);
  }

  .hero__top {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
  }

  .hero__center {
    display: grid;
    align-content: center;
    justify-items: center;
    gap: clamp(0.6rem, 2vh, 1.5rem);
    min-height: 0;
  }

  .hero__latin {
    padding-left: 0.9em;
    letter-spacing: 0.9em;
  }

  /* 名字的占位框：粒子编队 glyphs 会严丝合缝地装进这里（宽高比由脚本写入 --name-aspect） */
  .hero__name {
    position: relative;
    width: max(16rem, min(84vw, (100svh - 27rem) * var(--name-aspect, 3.24), 106rem));
    aspect-ratio: var(--name-aspect, 3.24);
    font-family: var(--font-serif);
    font-weight: 900;
  }

  .hero__name span {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    font-size: min(24vw, 42svh);
    line-height: 1;
    letter-spacing: 0.08em;
    white-space: nowrap;
  }

  /* 粒子在场时，文字本体隐身（读屏仍可读） */
  .has-gl .hero__name span {
    color: transparent;
    user-select: none;
    -webkit-user-select: none;
  }

  .hero__role {
    display: grid;
    justify-items: center;
    gap: 0.45rem;
    text-align: center;
  }

  .hero__role-label {
    display: inline-flex;
    align-items: center;
    gap: 0.9rem;
    color: var(--amber);
  }

  .hero__role-label::before,
  .hero__role-label::after {
    content: "";
    width: clamp(1.5rem, 4vw, 3.5rem);
    height: 1px;
    background: currentColor;
    opacity: 0.5;
  }

  .hero__role-zh {
    font-family: var(--font-serif);
    font-size: clamp(1.375rem, 1rem + 1.9vw, 2.5rem);
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: 0.1em;
  }

  .hero__role-alt {
    font-size: 0.9375rem;
    color: var(--paper-2);
  }

  .hero__role-alt i {
    margin-inline: 0.7em;
    color: var(--paper-4);
  }

  .hero__role-alt em {
    font-family: var(--font-latin);
    font-size: 1.2em;
    font-style: italic;
    color: var(--paper-3);
  }

  .hero__foot {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 1.5rem clamp(1.5rem, 4vw, 4rem);
  }

  .hero__facts {
    display: grid;
    grid-template-columns: auto auto minmax(0, 23rem);
    gap: 1.25rem clamp(1.5rem, 3.6vw, 4rem);
    justify-content: start;
  }

  .hero__facts dt {
    margin-bottom: 0.45rem;
  }

  .hero__facts dd {
    font-size: 0.9375rem;
    line-height: 1.7;
  }

  .hero__aside {
    display: grid;
    justify-items: end;
    gap: 0.8rem;
    text-align: right;
  }

  .hud {
    display: grid;
    gap: 0.25rem;
    min-width: 14rem;
  }

  .hud li {
    display: flex;
    justify-content: space-between;
    gap: 1.25rem;
  }

  .hud b {
    font-weight: 400;
    font-variant-numeric: tabular-nums;
    color: var(--paper);
  }

  .hero__hint {
    color: var(--amber);
  }

  .hero__scroll {
    display: inline-flex;
    align-items: center;
    gap: 0.9rem;
  }

  .hero__scroll .mono {
    transition: color 0.3s;
  }

  .hero__scroll:hover .mono {
    color: var(--paper);
  }

  .hero__scroll i {
    width: 1px;
    height: 2.75rem;
    background: linear-gradient(var(--amber), transparent);
    transform-origin: top center;
    animation: drip 2.4s var(--ease-in-out) infinite;
  }

  @keyframes drip {
    0% { transform: scaleY(0); }
    55% { transform: scaleY(1); opacity: 1; }
    100% { transform: scaleY(1); opacity: 0; }
  }

  /* 没有鼠标：与鼠标有关的提示都收起 */
  @media (hover: none), (pointer: coarse) {
    .hero__hint,
    .hud__agents,
    .footer__travel,
    .orgchart__tip,
    .skills__hint {
      display: none;
    }
  }

  @media (max-width: 1000px) {
    .hero__foot {
      grid-template-columns: minmax(0, 1fr);
    }

    .hero__aside {
      grid-auto-flow: column;
      align-items: end;
      justify-content: space-between;
      justify-items: start;
      text-align: left;
    }

    .hero__facts {
      grid-template-columns: auto minmax(0, 1fr);
    }

    .hero__facts-wide {
      grid-column: 1 / -1;
    }

    .hero__hint {
      display: none;
    }
  }

  /* 窄竖屏：名字竖排，求职意向竖写在它右侧（查询条件与 fx/stage.js 的 VERTICAL_QUERY 一致） */
  @media (max-width: 720px) and (orientation: portrait) {
    .hero__center {
      grid-template-columns: auto auto;
      align-items: center;
      justify-content: center;
      gap: 0 clamp(1.25rem, 8vw, 3rem);
    }

    .hero__latin {
      display: none;
    }

    .hero__name {
      width: max(5.5rem, min(34vw, 56svh * var(--name-aspect, 0.31)));
    }

    .hero__name span {
      font-size: 30vw;
      letter-spacing: 0;
      writing-mode: vertical-rl;
    }

    .hero__role {
      grid-auto-flow: column;
      align-items: start;
      justify-items: start;
      gap: 0.9rem;
      writing-mode: vertical-rl;
      text-align: left;
    }

    .hero__role-label::before {
      display: none;
    }

    .hero__role-label::after {
      width: 1px;
      height: 2rem;
    }

    .hero__role-zh {
      font-size: clamp(1.375rem, 6.4vw, 1.875rem);
      letter-spacing: 0.14em;
    }

    .hero__role-alt em {
      display: none;
    }

    .hero__role-alt i {
      display: none;
    }

    .hero__aside .hud {
      min-width: 0;
    }
  }

  /* ══ 01 概述 ═════════════════════════════════════════════════════════════ */
  .about__lead {
    max-width: 27em;
    font-family: var(--font-serif);
    font-size: clamp(1.375rem, 1rem + 1.85vw, 2.75rem);
    font-weight: 600;
    line-height: 1.64;
    letter-spacing: 0.02em;
  }

  .stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 2.5rem var(--gap);
    margin-top: clamp(4rem, 12vh, 8rem);
  }

  .stat {
    padding-top: 1.2rem;
    border-top: 1px solid var(--line-2);
  }

  .stat__value {
    font-family: var(--font-latin);
    font-size: clamp(3.25rem, 2rem + 5.2vw, 7.25rem);
    line-height: 1;
    font-variant-numeric: lining-nums tabular-nums;
  }

  .stat__affix {
    margin-inline: 0.04em;
    font-size: 0.5em;
    vertical-align: 0.62em;
    color: var(--amber);
  }

  .stat__label {
    margin-top: 0.9rem;
    line-height: 1.5;
  }

  .stat__note {
    margin-top: 0.35rem;
    text-transform: none;
    letter-spacing: 0.06em;
  }

  /* ══ 02 教育 ═════════════════════════════════════════════════════════════ */
  .education {
    padding-bottom: 0;
  }

  .edu {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: start;
    gap: 2.5rem var(--gap);
  }

  .edu__school {
    display: grid;
    grid-column: 1 / span 5;
    justify-items: start;
    gap: 0.6rem;
  }

  .edu__name {
    font-family: var(--font-serif);
    font-size: var(--fs-h2);
    font-weight: 900;
    line-height: 1.12;
    letter-spacing: 0.1em;
  }

  .edu__en {
    margin-bottom: 0.6rem;
    font-family: var(--font-latin);
    font-size: clamp(1.25rem, 1rem + 1.2vw, 2.125rem);
    font-style: italic;
    line-height: 1.2;
    color: var(--paper-3);
  }

  .edu__facts {
    grid-column: 7 / span 3;
  }

  .edu__campus {
    grid-column: 10 / span 3;
  }

  /* 山脊与云的占位带 */
  .edu__horizon {
    height: clamp(15rem, 48vh, 34rem);
    margin-top: clamp(1rem, 4vh, 3rem);
  }

  @media (max-width: 860px) {
    .edu__horizon {
      height: clamp(11rem, 30vh, 20rem);
    }
  }

  /* ══ 03 项目 ═════════════════════════════════════════════════════════════ */
  .toc {
    border-top: 1px solid var(--line-2);
  }

  .toc a {
    display: grid;
    grid-template-columns: 4.5rem minmax(0, 1fr) auto 1.5rem;
    align-items: baseline;
    gap: 1rem;
    padding-block: 1.05rem;
    border-bottom: 1px solid var(--line);
    transition: padding 0.6s var(--ease-out), color 0.3s;
  }

  .toc a:hover {
    padding-left: 1rem;
    color: var(--amber-hi);
  }

  .toc b {
    font-family: var(--font-serif);
    font-size: var(--fs-h3);
    font-weight: 600;
    letter-spacing: 0.05em;
  }

  .toc .mono:first-child {
    color: var(--amber);
  }

  .toc i {
    color: var(--paper-3);
    transition: translate 0.5s var(--ease-out), color 0.3s;
  }

  .toc a:hover i {
    color: var(--amber);
    translate: 0 4px;
  }

  /* 标题屏 */
  .project__poster {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: center;
    column-gap: var(--gap);
    min-height: 100svh;
    padding-block: clamp(5rem, 12vh, 8rem) clamp(2rem, 6vh, 4rem);
  }

  .project__intro {
    display: grid;
    grid-column: 1 / span 6;
    grid-row: 1;
    justify-items: start;
    gap: clamp(0.85rem, 1.9vh, 1.3rem);
  }

  .project__slot {
    grid-column: 7 / -1;
    grid-row: 1;
    height: min(72svh, 46vw);
  }

  .project--flip .project__intro {
    grid-column: 7 / -1;
  }

  .project--flip .project__slot {
    grid-column: 1 / span 6;
  }

  .project__kicker b {
    margin-right: 1.1em;
    font-weight: 500;
    color: var(--amber);
  }

  .project__title {
    font-family: var(--font-serif);
    font-size: var(--fs-h2);
    font-weight: 900;
    line-height: 1.16;
    letter-spacing: 0.04em;
  }

  .project__en {
    font-family: var(--font-latin);
    font-size: clamp(1.25rem, 1rem + 1.3vw, 2.125rem);
    font-style: italic;
    line-height: 1.2;
    color: var(--paper-3);
  }

  .project__summary {
    max-width: 29em;
    font-size: var(--fs-lead);
    line-height: 1.75;
    color: var(--paper-2);
    text-wrap: pretty;
  }

  .project__meta {
    width: min(100%, 27rem);
    margin-top: 0.4rem;
  }

  .project__meta > div {
    display: grid;
    grid-template-columns: 3.5rem minmax(0, 1fr);
    align-items: baseline;
    gap: 1rem;
    padding-block: 0.7rem;
    border-top: 1px solid var(--line);
  }

  .project__meta > div:last-child {
    border-bottom: 1px solid var(--line);
  }

  .project__status,
  .project__links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
  }

  .project__links {
    margin-top: 0.3rem;
  }

  .project__detail {
    padding-bottom: clamp(5rem, 15vh, 10rem);
  }

  /* 分面表格：标签 / 说明 / 关键数字 */
  .facets {
    border-top: 1px solid var(--line-2);
  }

  .facet {
    position: relative;
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: start;
    gap: 1rem var(--gap);
    padding-block: clamp(1.75rem, 4.6vh, 3rem);
    border-bottom: 1px solid var(--line);
  }

  .facet::before,
  .comp::before,
  .skill::before {
    content: "";
    position: absolute;
    inset: 0 calc(var(--gutter) * -0.5);
    z-index: -1;
    background: radial-gradient(30rem circle at var(--mx) var(--my), rgb(255 157 46 / 0.075), transparent 62%);
    opacity: var(--hover);
    pointer-events: none;
  }

  .facet__head {
    display: grid;
    grid-column: 1 / span 3;
    gap: 0.3rem;
  }

  .facet__no,
  .comp__no,
  .skill__no,
  .rule__no,
  .demo__no {
    color: var(--amber);
  }

  .facet__label {
    font-family: var(--font-serif);
    font-size: var(--fs-h3);
    font-weight: 600;
    line-height: 1.35;
    letter-spacing: 0.04em;
  }

  .facet__en,
  .skill__en,
  .rule__en {
    text-transform: none;
    letter-spacing: 0.05em;
  }

  .facet__text {
    grid-column: 4 / span 6;
    line-height: 1.95;
    color: var(--paper-2);
    text-wrap: pretty;
  }

  .facet__metric {
    display: grid;
    grid-column: 10 / -1;
    justify-items: end;
    gap: 0.4rem;
    text-align: right;
  }

  .facet__metric b {
    font-family: var(--font-latin);
    font-size: clamp(2.25rem, 1.5rem + 2.6vw, 4rem);
    font-weight: 400;
    line-height: 1;
    color: var(--amber-hi);
  }

  .facet__metric .mono {
    text-transform: none;
    letter-spacing: 0.06em;
  }

  /* 演示清单 */
  .demos {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--gap);
  }

  .demo {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-content: space-between;
    gap: 0.4rem 1rem;
    min-height: 8.75rem;
    height: 100%;
    padding: 1.2rem 1.3rem;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--panel);
    transition: border-color 0.4s;
  }

  .demo::before,
  .rule::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(16rem circle at var(--mx) var(--my), rgb(255 157 46 / 0.12), transparent 65%);
    opacity: var(--hover);
    pointer-events: none;
  }

  .demo__state {
    justify-self: end;
    text-transform: none;
    letter-spacing: 0.06em;
    color: var(--paper-4);
  }

  .demo.is-live .demo__state {
    color: var(--jade);
  }

  .demo.is-live:hover {
    border-color: var(--amber);
  }

  .demo__title {
    grid-column: 1 / -1;
    align-self: end;
    font-family: var(--font-serif);
    font-size: 1.375rem;
    font-weight: 600;
    line-height: 1.35;
    letter-spacing: 0.04em;
  }

  .demo__meta {
    grid-column: 1 / -1;
    text-transform: none;
    letter-spacing: 0.06em;
  }

  /* 波动实验台 */
  .labs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--gap);
  }

  .lab {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgb(11 10 9 / 0.66);
  }

  .lab canvas {
    width: 100%;
    aspect-ratio: 16 / 10;
    touch-action: pan-y;
  }

  html:not(.has-cursor) .lab canvas {
    cursor: crosshair;
  }

  .lab figcaption {
    display: grid;
    gap: 0.3rem;
    padding: 1.05rem 1.25rem 1.2rem;
    border-top: 1px solid var(--line);
  }

  .lab figcaption b {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    letter-spacing: 0.04em;
  }

  .lab figcaption span {
    font-size: 0.9375rem;
    color: var(--paper-2);
  }

  .lab output {
    margin-top: 0.3rem;
    text-transform: none;
    letter-spacing: 0.04em;
    font-variant-numeric: tabular-nums;
    color: var(--jade);
  }

  /* 汇报结构图 */
  .orgchart__canvas {
    padding: clamp(0.75rem, 2vw, 1.5rem);
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgb(11 10 9 / 0.62);
  }

  .org {
    width: 100%;
    height: auto;
    overflow: visible;
  }

  .org__edge {
    fill: none;
    stroke: rgb(143 227 214 / 0.24);
    stroke-width: 1;
    transition: stroke 0.4s;
  }

  .org__edge--trunk {
    stroke: rgb(255 157 46 / 0.42);
    stroke-width: 1.2;
  }

  .org__halo {
    fill: rgb(143 227 214 / 0.07);
  }

  .org__coord circle:not(.org__halo) {
    fill: var(--ink-1);
    stroke: var(--jade);
    stroke-width: 1.5;
  }

  .org__human .org__halo {
    fill: rgb(255 157 46 / 0.13);
  }

  .org__human circle:not(.org__halo) {
    fill: var(--amber);
  }

  .org__me {
    fill: var(--ink-0);
    font: 900 1.0625rem var(--font-serif);
  }

  .org__name {
    fill: var(--paper);
    font: 600 1rem var(--font-serif);
    letter-spacing: 0.05em;
  }

  .org__tag {
    fill: var(--paper-3);
    font: 400 0.6875rem var(--font-mono);
    letter-spacing: 0.08em;
  }

  .org__exec circle {
    fill: var(--paper);
  }

  .org__exec.is-anon circle {
    fill: var(--ink-1);
    stroke: var(--paper-3);
    stroke-width: 1;
  }

  .org__role {
    fill: var(--paper-2);
    font: 400 0.75rem var(--font-sans);
  }

  .org__pulse--jade {
    fill: var(--jade);
  }

  .org__pulse--amber {
    fill: var(--amber-hi);
  }

  .org__line {
    outline: none;
    transition: opacity 0.4s;
  }

  .orgchart__canvas.is-focusing .org__line:not(.is-focus) {
    opacity: 0.28;
  }

  .org__line.is-focus .org__edge:not(.org__edge--trunk) {
    stroke: rgb(143 227 214 / 0.62);
  }

  .org__line:focus-visible .org__coord circle:not(.org__halo) {
    stroke: var(--amber);
    stroke-width: 2.5;
  }

  .orgchart__legend {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem 0.6rem;
    margin-top: 1rem;
    font-size: var(--fs-small);
    color: var(--paper-3);
  }

  .orgchart__key {
    width: 1.5rem;
    height: 1px;
    background: var(--amber);
  }

  .orgchart__key--jade {
    margin-left: 1rem;
    background: var(--jade);
  }

  .orgchart__tip {
    flex-basis: 100%;
    margin-top: 0.4rem;
    font-size: 0.9375rem;
    color: var(--paper-2);
  }

  /* 行为规范 */
  .rules {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--gap);
  }

  .rule {
    position: relative;
    display: grid;
    align-content: start;
    gap: 0.6rem;
    min-height: 9.5rem;
    height: 100%;
    padding: 1.25rem 1.3rem 1.35rem;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--panel);
  }

  .rule__title {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    line-height: 1.45;
    letter-spacing: 0.03em;
  }

  .rule__en {
    align-self: end;
    margin-top: 0.5rem;
  }

  /* ══ 04 竞赛 ═════════════════════════════════════════════════════════════ */
  .comp-top {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: center;
    column-gap: var(--gap);
    min-height: 78svh;
  }

  .comp-top__head {
    grid-column: 1 / span 7;
    grid-row: 1;
  }

  .comp-top__head .sec-head {
    margin-bottom: 0;
  }

  .comp-top__slot {
    grid-column: 7 / -1;
    grid-row: 1;
    z-index: -1;
    height: min(66svh, 44vw);
  }

  .comps {
    border-top: 1px solid var(--line-2);
  }

  .comp {
    position: relative;
    display: grid;
    gap: clamp(1.5rem, 4vh, 2.5rem);
    padding-block: clamp(2rem, 5.5vh, 3.5rem);
    border-bottom: 1px solid var(--line);
  }

  .comp__head {
    display: grid;
    grid-template-columns: 4.5rem minmax(0, 1fr) auto;
    align-items: start;
    gap: 0.75rem var(--gap);
  }

  .comp__no {
    padding-top: 0.55em;
  }

  .comp__name {
    font-family: var(--font-serif);
    font-size: var(--fs-h3);
    font-weight: 600;
    line-height: 1.4;
    letter-spacing: 0.03em;
  }

  .comp__track {
    margin-top: 0.4rem;
    text-transform: none;
    letter-spacing: 0.06em;
  }

  .comp__work {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 1.5rem var(--gap);
    margin-left: calc(4.5rem + var(--gap));
    padding: clamp(1.25rem, 3vh, 2rem) clamp(1.25rem, 2.2vw, 2.25rem);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--panel);
  }

  .comp__work-head {
    display: grid;
    grid-column: 1 / span 5;
    align-content: start;
    justify-items: start;
    gap: 0.8rem;
  }

  .comp__work-title {
    margin-left: -0.5em;
    font-family: var(--font-serif);
    font-size: clamp(1.75rem, 1.2rem + 2.1vw, 3.25rem);
    font-weight: 900;
    line-height: 1.2;
    letter-spacing: 0.02em;
  }

  .comp__work-title small {
    display: block;
    margin-top: 0.6rem;
    margin-left: 1.2em;
    font-size: 0.42em;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--paper-2);
  }

  .comp__work-link {
    margin-top: 0.5rem;
  }

  .comp__work-body {
    display: grid;
    grid-column: 6 / -1;
    align-content: start;
    gap: 1.5rem;
  }

  .comp__work-body > p {
    line-height: 1.95;
    color: var(--paper-2);
    text-wrap: pretty;
  }

  .flow .mono {
    margin-bottom: 0.7rem;
    text-transform: none;
    letter-spacing: 0.06em;
  }

  .flow ol {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem 0;
    counter-reset: step;
  }

  .flow li {
    display: inline-flex;
    align-items: center;
    font-size: 0.9375rem;
    line-height: 1.4;
    counter-increment: step;
  }

  .flow li::before {
    content: counter(step, decimal-leading-zero);
    margin-right: 0.55em;
    font-family: var(--font-mono);
    font-size: 0.625rem;
    color: var(--amber);
  }

  .flow li:not(:last-child)::after {
    content: "";
    width: clamp(1rem, 2vw, 1.9rem);
    height: 1px;
    margin-inline: 0.8rem;
    background: var(--line-2);
  }

  /* ══ 05 技能 ═════════════════════════════════════════════════════════════ */
  .skills__grid {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: start;
    column-gap: var(--gap);
  }

  .skills__visual {
    position: sticky;
    top: calc(var(--nav-h) + 3vh);
    display: grid;
    grid-column: 1 / span 5;
    gap: 0.75rem;
  }

  .skills__slot {
    height: min(66svh, 40vw);
  }

  .skills__hint {
    text-align: center;
    text-transform: none;
    letter-spacing: 0.06em;
  }

  .skills__list {
    grid-column: 7 / -1;
    border-top: 1px solid var(--line-2);
  }

  .skill {
    position: relative;
    display: grid;
    gap: 0.9rem;
    padding-block: clamp(1.75rem, 4.4vh, 2.75rem);
    border-bottom: 1px solid var(--line);
    outline-offset: 6px;
  }

  .skill__head {
    display: grid;
    grid-template-columns: 2.5rem minmax(0, 1fr) auto;
    align-items: baseline;
    gap: 0.75rem;
  }

  .skill__title {
    font-family: var(--font-serif);
    font-size: var(--fs-h3);
    font-weight: 600;
    letter-spacing: 0.04em;
    transition: color 0.4s;
  }

  .skill:hover .skill__title,
  .skill:focus .skill__title {
    color: var(--amber-hi);
  }

  .skill__text,
  .skill .chips {
    padding-left: 3.25rem;
  }

  .skill__text {
    line-height: 1.9;
    color: var(--paper-2);
  }

  /* ══ 06 传送门 ═══════════════════════════════════════════════════════════ */
  .portals-top {
    position: relative;
    display: grid;
    align-content: center;
    min-height: 88svh;
  }

  .portals-top__slot {
    position: absolute;
    top: 50%;
    left: 50%;
    z-index: -1;
    width: min(98svh, 88vw);
    aspect-ratio: 1;
    translate: -50% -50%;
  }

  .portals-top .sec-head {
    position: relative;
    justify-items: center;
    margin-bottom: 0;
    text-align: center;
  }

  /* 标题背后压一层暗晕：门环在四周发光，中间的字依然清楚 */
  .portals-top .sec-head::before {
    content: "";
    position: absolute;
    inset: -34% 0;
    z-index: -1;
    background: radial-gradient(closest-side, rgb(6 5 4 / 0.86) 35%, rgb(6 5 4 / 0.5) 68%, transparent);
    pointer-events: none;
  }

  .portals-top .sec-head__title {
    justify-content: center;
  }

  .portals-top .sec-head__rule {
    display: none;
  }

  .portal-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--gap);
    padding-bottom: clamp(3rem, 10vh, 7rem);
  }

  .portal-cell {
    grid-column: span var(--span, 1);
    perspective: 1100px;
  }

  .portal {
    position: relative;
    isolation: isolate;
    display: grid;
    grid-template-rows: auto 1fr auto;
    gap: 1.25rem;
    height: 100%;
    min-height: 21rem;
    padding: 1.3rem 1.5rem 1.25rem;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: linear-gradient(155deg, rgb(30 27 23 / 0.82), rgb(11 10 9 / 0.82));
    transform: rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
    transition: border-color 0.5s;
  }

  /* 跟随光标的聚光 */
  .portal::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: radial-gradient(22rem circle at var(--mx) var(--my), rgb(255 157 46 / 0.16), transparent 62%);
    opacity: var(--hover);
    pointer-events: none;
  }

  .portal.is-live:hover {
    border-color: rgb(255 157 46 / 0.7);
  }

  .portal.is-soon {
    border-style: dashed;
  }

  .portal__top {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
  }

  .portal__state {
    display: inline-flex;
    align-items: center;
    gap: 0.6em;
    text-transform: none;
    letter-spacing: 0.08em;
  }

  .portal__state i {
    width: 7px;
    height: 7px;
    margin: 0;
    border: 1px solid var(--paper-3);
    border-radius: 50%;
  }

  .portal.is-live .portal__state {
    color: var(--jade);
  }

  .portal.is-live .portal__state i {
    border-color: var(--jade);
    background: var(--jade);
    box-shadow: 0 0 10px var(--jade);
  }

  /* 卡片右上角的「门环」：悬停时转起来 */
  .portal__ring {
    position: absolute;
    top: -4.5rem;
    right: -4.5rem;
    z-index: -1;
    width: 15rem;
    aspect-ratio: 1;
    border: 1px solid var(--line);
    border-radius: 50%;
    transition: scale 0.9s var(--ease-out), border-color 0.5s;
  }

  .portal__ring i {
    position: absolute;
    inset: 1.4rem;
    border: 1px dashed var(--line-2);
    border-radius: 50%;
    animation: spin 40s linear infinite;
    animation-play-state: paused;
  }

  .portal__ring i:last-child {
    inset: 3.1rem;
    border-style: solid;
    border-color: transparent;
    border-top-color: var(--amber);
    opacity: 0.55;
    animation-duration: 9s;
    animation-direction: reverse;
  }

  .portal:hover .portal__ring {
    border-color: var(--line-2);
    scale: 1.08;
  }

  .portal:hover .portal__ring i {
    animation-play-state: running;
  }

  @keyframes spin {
    to { rotate: 360deg; }
  }

  .portal__body {
    display: grid;
    align-content: end;
    justify-items: start;
  }

  .portal__title {
    font-family: var(--font-serif);
    font-size: clamp(1.75rem, 1.3rem + 1.6vw, 2.75rem);
    font-weight: 900;
    line-height: 1.2;
    letter-spacing: 0.06em;
  }

  .portal.is-soon .portal__title {
    color: var(--paper-2);
  }

  /* 整张卡片可点：把链接的点击区铺满卡片 */
  .portal__hit::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
  }

  .portal__hit:focus-visible {
    outline: none;
  }

  .portal:has(.portal__hit:focus-visible) {
    outline: 2px solid var(--amber);
    outline-offset: 4px;
  }

  .portal__en {
    margin-top: 0.15rem;
    font-family: var(--font-latin);
    font-size: 1.25rem;
    font-style: italic;
    line-height: 1.3;
    color: var(--paper-3);
  }

  .portal__desc {
    max-width: 28em;
    margin-top: 0.8rem;
    line-height: 1.75;
    color: var(--paper-2);
  }

  .portal__children {
    position: relative;
    z-index: 2;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.1rem;
  }

  .portal__child {
    display: inline-flex;
    align-items: center;
    gap: 0.45em;
    padding: 0.35em 0.8em;
    border: 1px dashed var(--line-2);
    border-radius: 3px;
    font-size: 0.8125rem;
    line-height: 1.5;
    color: var(--paper-3);
  }

  .portal__child.is-live {
    border-style: solid;
    border-color: var(--amber-lo);
    color: var(--paper);
    transition: background 0.3s, color 0.3s;
  }

  .portal__child.is-live:hover {
    background: var(--amber);
    color: var(--ink-0);
  }

  .portal__child i {
    color: var(--amber);
  }

  .portal__child.is-live:hover i {
    color: inherit;
  }

  .portal__foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--line);
  }

  .portal__url {
    overflow: hidden;
    text-overflow: ellipsis;
    text-transform: none;
    letter-spacing: 0.04em;
    white-space: nowrap;
  }

  .portal__arrow {
    display: grid;
    flex: none;
    place-items: center;
    width: 2.5rem;
    height: 2.5rem;
    border: 1px solid var(--line-2);
    border-radius: 50%;
    font-size: 1rem;
    color: var(--paper);
    transition: background 0.4s, color 0.4s, border-color 0.4s, rotate 0.6s var(--ease-out);
  }

  .portal.is-live:hover .portal__arrow {
    border-color: var(--amber);
    background: var(--amber);
    color: var(--ink-0);
    rotate: 45deg;
  }

  .portal.is-soon .portal__arrow {
    opacity: 0.3;
  }

  /* ══ 07 联系 ═════════════════════════════════════════════════════════════ */
  .contact {
    padding-bottom: 0;
  }

  .contact__grid {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: center;
    column-gap: var(--gap);
  }

  .contact__body {
    display: grid;
    grid-column: 1 / span 7;
    grid-row: 1;
    justify-items: start;
    gap: clamp(1.1rem, 2.8vh, 1.9rem);
  }

  .contact__slot {
    grid-column: 8 / -1;
    grid-row: 1;
    height: min(64svh, 40vw);
  }

  .contact__headline {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 1.4rem + 5vw, 6.25rem);
    font-weight: 900;
    line-height: 1.18;
    letter-spacing: 0.03em;
  }

  .contact__text {
    max-width: 30em;
    font-size: var(--fs-lead);
    color: var(--paper-2);
  }

  .contact__mail {
    display: flex;
    flex-wrap: wrap;
    align-items: end;
    gap: 1rem 1.75rem;
    margin-top: 0.75rem;
  }

  .mail {
    display: grid;
    gap: 0.25rem;
  }

  .mail b {
    padding-bottom: 0.1em;
    background: linear-gradient(var(--amber), var(--amber)) 0 100% / 100% 1px no-repeat;
    font-family: var(--font-latin);
    font-size: clamp(1.75rem, 1.2rem + 2.5vw, 3.75rem);
    font-weight: 400;
    line-height: 1.15;
    overflow-wrap: anywhere;
    transition: color 0.4s, background-size 0.7s var(--ease-out);
  }

  .mail:hover b {
    color: var(--amber-hi);
    background-size: 0 1px;
    background-position: 100% 100%;
  }

  .contact__links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 2rem;
  }

  .contact__links a {
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    padding-bottom: 0.25rem;
    border-bottom: 1px solid var(--line-2);
    font-size: 1.0625rem;
    transition: border-color 0.3s;
  }

  .contact__links a:hover {
    border-color: var(--amber);
  }

  .contact__links i {
    color: var(--amber);
    transition: translate 0.4s var(--ease-out);
  }

  .contact__links a:hover i {
    translate: 3px -3px;
  }

  .footer {
    display: grid;
    gap: 1.1rem;
    margin-top: clamp(5rem, 14vh, 9rem);
    padding-block: 1.75rem 2rem;
    border-top: 1px solid var(--line-2);
  }

  .footer__row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.6rem 2rem;
  }

  .footer__sign {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-serif);
    font-weight: 600;
    letter-spacing: 0.08em;
  }

  .footer__sign i {
    color: var(--paper-4);
  }

  .footer__top {
    transition: color 0.3s;
  }

  .footer__top:hover {
    color: var(--amber);
  }

  .footer__meta {
    text-transform: none;
    letter-spacing: 0.06em;
  }

  .footer__meta b {
    font-weight: 400;
    font-variant-numeric: tabular-nums;
    color: var(--amber-hi);
  }

  /* ══ 窄屏：收成单栏，占位框移到文字上方 ══════════════════════════════════ */
  @media (max-width: 860px) {
    .stats {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .edu__school,
    .edu__facts,
    .edu__campus {
      grid-column: 1 / -1;
    }

    .toc a {
      grid-template-columns: 3.5rem minmax(0, 1fr) 1.25rem;
    }

    .toc a .mono:nth-of-type(2) {
      display: none;
    }

    .project__poster {
      min-height: 0;
      padding-top: clamp(4rem, 10vh, 6rem);
    }

    .project__intro,
    .project--flip .project__intro {
      grid-column: 1 / -1;
      grid-row: 2;
    }

    .project__slot,
    .project--flip .project__slot {
      grid-column: 1 / -1;
      grid-row: 1;
      height: 70vw;
      margin-bottom: 1.5rem;
    }

    .facet__head,
    .facet__text,
    .facet__metric {
      grid-column: 1 / -1;
    }

    .facet__metric {
      grid-auto-flow: column;
      align-items: baseline;
      justify-content: start;
      justify-items: start;
      gap: 0.9rem;
      text-align: left;
    }

    .demos,
    .rules {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .labs {
      grid-template-columns: minmax(0, 1fr);
    }

    .comp-top {
      min-height: 0;
    }

    .comp-top__head {
      grid-column: 1 / -1;
      grid-row: 2;
    }

    .comp-top__slot {
      grid-column: 1 / -1;
      grid-row: 1;
      height: 66vw;
      margin-bottom: 1rem;
    }

    .comp__head {
      grid-template-columns: minmax(0, 1fr) auto;
    }

    .comp__no {
      grid-column: 1 / -1;
      padding-top: 0;
    }

    .comp__work {
      margin-left: 0;
    }

    .comp__work-head,
    .comp__work-body {
      grid-column: 1 / -1;
    }

    .skills__visual {
      position: static;
      grid-column: 1 / -1;
    }

    .skills__slot {
      height: 74vw;
    }

    .skills__list {
      grid-column: 1 / -1;
      margin-top: 1.5rem;
    }

    .skill__head {
      grid-template-columns: 2.25rem minmax(0, 1fr);
    }

    .skill__en {
      grid-column: 2;
    }

    .skill__text,
    .skill .chips {
      padding-left: 0;
    }

    .portals-top {
      min-height: 72svh;
    }

    .portals-top__slot {
      width: 92vw;
    }

    .portal-grid {
      grid-template-columns: minmax(0, 1fr);
    }

    .portal-cell {
      grid-column: auto;
    }

    .portal {
      min-height: 17rem;
    }

    .contact__body {
      grid-column: 1 / -1;
      grid-row: 2;
    }

    .contact__slot {
      grid-column: 1 / -1;
      grid-row: 1;
      height: 70vw;
    }
  }

  @media (max-width: 520px) {
    .demos,
    .rules {
      grid-template-columns: minmax(0, 1fr);
    }

    .demo,
    .rule {
      min-height: 0;
    }

    .hero__facts {
      grid-template-columns: minmax(0, 1fr);
    }
  }
}