/* ============================================================
   LOIFY — 光学杂志式设计语言
   纸白 × 墨色 × 琥珀板材，发丝线分割，衬线大字标
   ============================================================ */

:root {
  --paper: #f6f1e8;
  --paper-deep: #efe8da;
  --ink: #171410;
  --ink-soft: #5d5648;
  --amber: #a8581c;
  --amber-soft: #c8854b;
  --line: rgba(23, 20, 16, 0.16);
  --line-soft: rgba(23, 20, 16, 0.09);

  --serif: "Fraunces", "Noto Serif SC", serif;
  --sans: "Inter", "Noto Sans SC", -apple-system, sans-serif;

  --pad: clamp(20px, 5vw, 72px);
  --radius: 2px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.01em;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

::selection { background: var(--amber); color: var(--paper); }

/* ---------- 通用元素 ---------- */

.overline {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 22px;
}
.overline--amber { color: var(--amber); }
.overline--paper { color: var(--amber-soft); }

h1, h2 {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: 0.015em;
}

.section-lede { color: var(--ink-soft); max-width: 44ch; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 30px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  border-radius: 999px;
  transition: all 0.3s ease;
  white-space: nowrap;
}
.btn--ink { background: var(--ink); color: var(--paper); }
.btn--ink:hover { background: var(--amber); transform: translateY(-1px); }
.btn--ghost { border: 1px solid var(--line); color: var(--ink); }
.btn--ghost:hover { border-color: var(--ink); }
.btn--paper { background: var(--paper); color: var(--ink); }
.btn--paper:hover { background: var(--amber-soft); color: var(--ink); }

/* 滚动浮现 */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1), transform 0.9s cubic-bezier(0.16, 1, 0.3, 1); }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 顶栏 ---------- */

.topbar {
  background: var(--ink);
  color: rgba(246, 241, 232, 0.85);
  text-align: center;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  padding: 9px var(--pad);
}

/* ---------- 导航 ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 241, 232, 0.88);
  backdrop-filter: saturate(1.2) blur(14px);
  -webkit-backdrop-filter: saturate(1.2) blur(14px);
  border-bottom: 1px solid var(--line-soft);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 0 var(--pad);
  height: 68px;
}

.nav__brand {
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.nav__brand img {
  position: relative;
  z-index: 1;
  height: 58px;
  width: auto;
  mix-blend-mode: multiply; /* 手写体 Logo 白底融入纸色背景 */
}
.nav__brand::after {
  content: "";
  pointer-events: none;
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(
    105deg,
    transparent 0%,
    transparent 45%,
    rgba(255, 255, 255, 0) 46%,
    rgba(255, 246, 222, 0.96) 50%,
    rgba(255, 255, 255, 0) 54%,
    transparent 55%,
    transparent 100%
  );
  background-size: 260% 100%;
  background-position: -120% 50%;
  opacity: 0.96;
  animation: loify-logo-sheen 8.4s linear infinite;
  -webkit-mask-image: url("../assets/logo.png");
  mask-image: url("../assets/logo.png");
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-size: contain;
  mask-size: contain;
}

@keyframes loify-logo-sheen {
  0% { background-position: -120% 50%; }
  100% { background-position: 120% 50%; }
}

@media (prefers-reduced-motion: reduce) {
  .nav__brand::after {
    animation: none;
    opacity: 0;
  }
}

.nav__links { display: flex; gap: clamp(18px, 3vw, 44px); }
.nav__links a {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 13.5px;
  font-weight: 500;
  line-height: 1.3;
  padding: 6px 2px;
  position: relative;
}
.nav__links a span {
  font-size: 9px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-soft);
  font-weight: 400;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 50%; bottom: -2px;
  width: 0; height: 1.5px;
  background: var(--amber);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}
.nav__links a:hover::after { width: 100%; }

/* 汉堡按钮与抽屉菜单：仅手机端显示 */
.nav__burger { display: none; }
.mmenu { display: none; }

.nav__actions { display: flex; align-items: center; gap: 6px; }
.nav__icon, .nav__cart { display: inline-flex; align-items: center; justify-content: center; color: inherit; padding: 9px; border-radius: 50%; transition: background 0.25s; position: relative; }
.nav__icon:hover, .nav__cart:hover { background: rgba(23, 20, 16, 0.06); }
.nav__icon svg, .nav__cart svg { width: 19px; height: 19px; display: block; }
.nav__cart em {
  position: absolute;
  top: 2px; right: 0;
  font-style: normal;
  font-size: 9px;
  font-weight: 700;
  background: var(--amber);
  color: var(--paper);
  width: 15px; height: 15px;
  border-radius: 50%;
  display: grid;
  place-items: center;
}
.nav__cart em[hidden] { display: none; }

/* ---------- HERO ---------- */

.hero { padding: clamp(40px, 7vh, 90px) var(--pad) 0; }

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(32px, 6vw, 96px);
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
}

.hero__copy h1 {
  font-size: clamp(44px, 6.2vw, 88px);
  line-height: 1.12;
  margin-bottom: 28px;
}

.hero__lede {
  color: var(--ink-soft);
  font-size: 16px;
  max-width: 40ch;
  margin-bottom: 40px;
}

.hero__cta { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }

.hero__media { position: relative; }
.hero__media img {
  width: 100%;
  aspect-ratio: 4 / 4.6;
  object-fit: cover;
  border-radius: var(--radius);
}
.hero__media figcaption {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-top: 14px;
  font-size: 12.5px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 14px;
}
.hero__media figcaption i {
  font-style: normal;
  font-size: 10px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--amber);
}
.hero__media figcaption a { margin-left: auto; font-weight: 600; color: var(--ink); }
.hero__media figcaption a:hover { color: var(--amber); }

/* 旅程主轴 */
.journey {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: 1400px;
  margin: clamp(56px, 9vh, 110px) auto 0;
  border-top: 1px solid var(--line);
}
.journey li {
  padding: 36px clamp(18px, 2.5vw, 40px) 44px 0;
  border-right: 1px solid var(--line-soft);
}
.journey li:last-child { border-right: 0; }
.journey li + li { padding-left: clamp(18px, 2.5vw, 40px); }
.journey__no {
  font-family: var(--serif);
  font-size: 13px;
  color: var(--amber);
  letter-spacing: 0.1em;
}
.journey h3 {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 500;
  margin: 14px 0 10px;
}
.journey p { color: var(--ink-soft); font-size: 14px; max-width: 30ch; }
.journey em {
  display: inline-block;
  margin-top: 16px;
  font-style: normal;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 14px;
}

/* ---------- 在线验光 ---------- */

.refraction {
  margin-top: clamp(70px, 12vh, 140px);
  background: var(--paper-deep);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.refraction__inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: clamp(64px, 10vh, 130px) var(--pad);
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(40px, 7vw, 110px);
  align-items: center;
}

.refraction h2 {
  font-size: clamp(34px, 4.4vw, 60px);
  line-height: 1.18;
  margin-bottom: 24px;
}

.refraction__flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
  margin-top: 34px;
}
.refraction__flow li {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 7px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.4);
  position: relative;
}
.refraction__flow li:last-child { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.refraction__specs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 240px));
  margin: 36px 0 44px;
  border-top: 1px solid var(--line);
}
.refraction__specs li {
  padding: 18px 12px 18px 0;
  border-bottom: 1px solid var(--line-soft);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.refraction__specs strong {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.refraction__specs span { font-size: 12.5px; color: var(--ink-soft); }

.refraction__note { font-size: 12px; color: var(--ink-soft); max-width: 24ch; line-height: 1.6; }

/* CSS 手机模型 */
.phone {
  justify-self: center;
  width: min(320px, 80vw);
  aspect-ratio: 9 / 18.5;
  background: var(--ink);
  border-radius: 46px;
  padding: 12px;
  box-shadow:
    0 60px 110px -40px rgba(23, 20, 16, 0.45),
    0 24px 44px -24px rgba(23, 20, 16, 0.32);
  transform: rotate(2.5deg);
}
.phone__screen {
  height: 100%;
  border-radius: 36px;
  background: linear-gradient(168deg, #fbf8f1 0%, #f1e9da 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 34px 24px 26px;
  overflow: hidden;
}
.phone__status {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--amber);
}
.phone__optotype {
  flex: 1;
  display: grid;
  place-items: center;
}
.astig-dial { width: 148px; height: 148px; }
.astig-dial__spoke line {
  stroke: var(--ink);
  stroke-width: 4;
  stroke-linecap: round;
  opacity: 0.28;
  transition: opacity 0.5s ease, stroke-width 0.5s ease;
}
.astig-dial__spoke.is-hot line {
  stroke-width: 7;
  opacity: 1;
}
.phone__hint { font-size: 11.5px; color: var(--ink-soft); margin-bottom: 18px; }
.phone__progress {
  width: 100%; height: 3px;
  background: rgba(23, 20, 16, 0.12);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 22px;
}
.phone__progress i {
  display: block;
  height: 100%;
  width: calc(var(--p) * 100%);
  background: var(--amber);
  border-radius: 99px;
}
.phone__readout {
  width: 100%;
  border-top: 1px solid var(--line-soft);
  padding-top: 14px;
  display: grid;
  gap: 5px;
  font-family: var(--serif);
  font-size: 13.5px;
  letter-spacing: 0.04em;
}
.phone__readout b { color: var(--amber); margin-right: 8px; font-weight: 600; }

/* ---------- 视界 Journal ---------- */

.journal {
  max-width: 1400px;
  margin: 0 auto;
  padding: clamp(72px, 12vh, 150px) var(--pad) 0;
}

.journal__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  margin-bottom: clamp(40px, 6vh, 64px);
}
.journal__head h2 { font-size: clamp(32px, 4vw, 54px); line-height: 1.2; }
.journal__intro {
  max-width: 34ch;
  color: var(--ink-soft);
  font-size: 14.5px;
  border-left: 2px solid var(--amber);
  padding-left: 20px;
}

.journal__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(28px, 4vw, 56px);
}

.story { display: flex; flex-direction: column; }
.story--feature {
  grid-row: span 2;
}

.story__media { position: relative; overflow: hidden; border-radius: var(--radius); }
.story__media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  transition: transform 1.1s cubic-bezier(0.16, 1, 0.3, 1);
}
.story--feature .story__media img { aspect-ratio: 4 / 3.4; }
.story:hover .story__media img { transform: scale(1.035); }
.story__tag {
  position: absolute;
  top: 16px; left: 16px;
  background: var(--paper);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.2em;
  padding: 6px 14px;
  border-radius: 999px;
}

.story__body { padding: 24px 0 0; }
.story__body h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 21px;
  line-height: 1.4;
  margin-bottom: 10px;
}
.story--feature .story__body h3 { font-size: clamp(24px, 2.4vw, 32px); }
.story__body h3 a:hover { color: var(--amber); }
.story__body > p { color: var(--ink-soft); font-size: 14px; max-width: 52ch; }

/* 文内货架条 */
.shelf-strip {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.shelf-strip__label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--amber);
  width: 100%;
}
.shelf-chip {
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 16px 7px 8px;
  transition: all 0.3s ease;
  background: rgba(255, 255, 255, 0.35);
}
.shelf-chip:hover { border-color: var(--ink); background: #fff; }
.shelf-chip img {
  width: 52px; height: 34px;
  object-fit: contain;
  background: var(--paper-deep);
  border-radius: 999px;
  padding: 3px 6px;
}
.shelf-chip span { display: flex; flex-direction: column; line-height: 1.35; }
.shelf-chip b { font-size: 12.5px; font-weight: 600; }
.shelf-chip i { font-style: normal; font-size: 11.5px; color: var(--ink-soft); }
.shelf-chip em {
  font-style: normal;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--amber);
  margin-left: 6px;
}

.journal__more { text-align: center; padding: clamp(40px, 6vh, 64px) 0 0; }

/* ---------- AI 试戴 ---------- */

.tryon {
  margin-top: clamp(80px, 13vh, 160px);
  background: var(--ink);
  color: var(--paper);
}

.tryon__inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: clamp(72px, 11vh, 140px) var(--pad);
}

.tryon__head { max-width: 620px; margin-bottom: clamp(44px, 7vh, 72px); }
.tryon__head h2 { font-size: clamp(32px, 4.2vw, 56px); line-height: 1.22; margin-bottom: 22px; }
.tryon__head p { color: rgba(246, 241, 232, 0.62); font-size: 15px; max-width: 46ch; }

.tryon__features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(16px, 2.4vw, 32px);
  margin-bottom: clamp(44px, 7vh, 72px);
  border-top: 1px solid rgba(246, 241, 232, 0.16);
}
.tryon__features li {
  padding-top: 20px;
  display: grid;
  gap: 6px;
  align-content: start;
}
.tryon__features b {
  font-family: var(--serif);
  font-size: 16.5px;
  font-weight: 500;
  letter-spacing: 0.03em;
}
.tryon__features span {
  font-size: 12.5px;
  line-height: 1.65;
  color: rgba(246, 241, 232, 0.55);
}

.tryon__guest {
  width: 100%;
  font-size: 12px;
  color: rgba(246, 241, 232, 0.45);
  letter-spacing: 0.06em;
}

.tryon__gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(14px, 2vw, 28px);
}
.tryon__gallery figure:nth-child(2) { transform: translateY(clamp(18px, 3vw, 44px)); }
.tryon__gallery img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius);
}
.tryon__gallery figcaption {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: rgba(246, 241, 232, 0.55);
  padding-top: 12px;
}

.tryon__cta {
  margin-top: clamp(56px, 9vh, 88px);
  display: flex;
  align-items: center;
  gap: 26px;
  flex-wrap: wrap;
}
.tryon__applink {
  font-size: 13px;
  font-weight: 500;
  color: rgba(246, 241, 232, 0.72);
  border-bottom: 1px solid rgba(246, 241, 232, 0.3);
  padding-bottom: 2px;
  transition: color 0.3s;
}
.tryon__applink:hover { color: var(--paper); }

/* ---------- 本周货架 ---------- */

.shelf {
  max-width: 1400px;
  margin: 0 auto;
  padding: clamp(72px, 12vh, 150px) var(--pad) 0;
}

.shelf__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  margin-bottom: clamp(36px, 5vh, 56px);
}
.shelf__head h2 { font-size: clamp(30px, 3.8vw, 50px); line-height: 1.22; }

.shelf__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(16px, 2.4vw, 32px);
}

.product__media {
  position: relative;
  background: var(--paper-deep);
  border-radius: var(--radius);
  overflow: hidden;
}
.product__media img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  mix-blend-mode: multiply;
  transition: transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}
.product:hover .product__media img { transform: scale(1.05) rotate(-1.5deg); }
.product__try {
  position: absolute;
  left: 50%; bottom: 16px;
  transform: translate(-50%, 8px);
  background: var(--ink);
  color: var(--paper);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  padding: 9px 22px;
  border-radius: 999px;
  opacity: 0;
  transition: all 0.35s ease;
  white-space: nowrap;
}
.product:hover .product__try { opacity: 1; transform: translate(-50%, 0); }

.product__meta { padding: 18px 4px 0; display: grid; gap: 1px; }
.product__meta h3 { font-family: var(--serif); font-size: 17px; font-weight: 500; }
.product__meta p { font-size: 12px; color: var(--ink-soft); }
.product__meta b { font-size: 14px; font-weight: 600; margin-top: 8px; }

/* ---------- Loify 生态 ---------- */

.universe {
  max-width: 1400px;
  margin: 0 auto;
  padding: clamp(72px, 12vh, 150px) var(--pad) 0;
}

.universe__head { max-width: 640px; margin-bottom: clamp(40px, 6vh, 60px); }
.universe__head h2 { font-size: clamp(30px, 3.8vw, 50px); line-height: 1.22; }

.universe__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line-soft);
}
.ucard {
  border-right: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  padding: 30px 26px 34px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: background 0.35s ease;
}
.ucard:hover { background: var(--paper-deep); }
.ucard__platform {
  align-self: flex-start;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 10px;
}
.ucard h3 { font-family: var(--serif); font-size: 22px; font-weight: 500; }
.ucard p { font-size: 13px; color: var(--ink-soft); flex: 1; }
.ucard a { font-size: 13px; font-weight: 600; transition: color 0.25s; }
.ucard a:hover { color: var(--amber); }

/* ---------- 宣言 ---------- */

.manifesto {
  padding: clamp(90px, 16vh, 190px) var(--pad);
  text-align: center;
}
.manifesto p {
  font-family: var(--serif);
  font-size: clamp(28px, 4.4vw, 56px);
  font-weight: 400;
  line-height: 1.45;
  max-width: 22ch;
  margin: 0 auto;
}
.manifesto cite {
  display: block;
  margin-top: 30px;
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* ---------- 页脚 ---------- */

.footer {
  border-top: 1px solid var(--line);
  padding: clamp(48px, 8vh, 80px) var(--pad) 36px;
  max-width: 1400px;
  margin: 0 auto;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr) 1.4fr;
  gap: clamp(28px, 4vw, 56px);
  padding-bottom: clamp(40px, 6vh, 64px);
}

.footer__logo { margin-bottom: 14px; }
.footer__logo img { height: 64px; width: auto; mix-blend-mode: multiply; }
.footer__brand p:last-child { font-size: 13px; color: var(--ink-soft); }

.footer h4 {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 16px;
}
.footer nav a {
  display: block;
  font-size: 13.5px;
  padding: 4px 0;
  color: var(--ink);
  transition: color 0.25s;
}
.footer nav a:hover { color: var(--amber); }

.footer__pay span {
  display: inline-block;
  font-size: 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 14px;
  margin: 0 6px 8px 0;
  color: var(--ink-soft);
}

.footer__legal {
  border-top: 1px solid var(--line-soft);
  padding-top: 24px;
  font-size: 11.5px;
  color: var(--ink-soft);
}

/* ---------- 响应式 ---------- */

@media (max-width: 1024px) {
  .journal__grid { grid-template-columns: 1fr; }
  .story--feature { grid-row: auto; }
  .shelf__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
  .universe__grid { grid-template-columns: repeat(2, 1fr); }
  .tryon__features { grid-template-columns: repeat(2, 1fr); }
}

/* ===== 手机版：在桌面视效不变的前提下收紧节奏 ===== */
@media (max-width: 860px) {
  body { font-size: 14px; line-height: 1.7; }

  /* 顶栏更轻 */
  .topbar { font-size: 10px; letter-spacing: 0.08em; padding: 7px 16px; }

  /* 导航：汉堡居左 · Logo 居中 · 动作居右 */
  .nav__inner { height: 60px; padding: 0 14px; position: relative; }
  .nav__links { display: none; }
  .nav__brand {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
  }
  .nav__brand img { height: 48px; }
  .nav__actions { margin-left: auto; gap: 2px; }

  .nav__burger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 40px;
    height: 40px;
    padding: 0 8px;
    border-radius: 50%;
  }
  .nav__burger span {
    display: block;
    height: 1.5px;
    background: var(--ink);
    border-radius: 2px;
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s;
  }

  /* 抽屉菜单 */
  .mmenu {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 300;
    pointer-events: none;
    visibility: hidden;
    transition: visibility 0s linear 0.5s;
  }
  .mmenu.is-open { pointer-events: auto; visibility: visible; transition-delay: 0s; }

  .mmenu__scrim {
    position: absolute;
    inset: 0;
    background: rgba(23, 20, 16, 0.4);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    opacity: 0;
    transition: opacity 0.4s ease;
  }
  .mmenu.is-open .mmenu__scrim { opacity: 1; }

  .mmenu__panel {
    position: absolute;
    top: 0; left: 0; bottom: 0;
    width: min(330px, 84vw);
    background: var(--paper);
    border-right: 1px solid var(--line-soft);
    box-shadow: 30px 0 80px -30px rgba(23, 20, 16, 0.35);
    display: flex;
    flex-direction: column;
    padding: 14px 26px 28px;
    transform: translateX(-102%);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .mmenu.is-open .mmenu__panel { transform: none; }

  .mmenu__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--line-soft);
  }
  .mmenu__top img { height: 40px; width: auto; mix-blend-mode: multiply; }
  .mmenu__close { padding: 9px; border-radius: 50%; margin-right: -9px; }
  .mmenu__close:hover { background: rgba(23, 20, 16, 0.06); }
  .mmenu__close svg { width: 20px; height: 20px; display: block; }

  .mmenu__links { flex: 1; padding-top: 26px; }
  .mmenu__links li + li { border-top: 1px solid var(--line-soft); }
  .mmenu__links a {
    display: flex;
    align-items: baseline;
    gap: 16px;
    font-family: var(--serif);
    font-size: 24px;
    font-weight: 500;
    padding: 18px 2px;
    opacity: 0;
    transform: translateX(-14px);
    transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .mmenu.is-open .mmenu__links a { opacity: 1; transform: none; }
  .mmenu.is-open .mmenu__links li:nth-child(1) a { transition-delay: 0.12s; }
  .mmenu.is-open .mmenu__links li:nth-child(2) a { transition-delay: 0.18s; }
  .mmenu.is-open .mmenu__links li:nth-child(3) a { transition-delay: 0.24s; }
  .mmenu.is-open .mmenu__links li:nth-child(4) a { transition-delay: 0.30s; }
  .mmenu__links i {
    font-style: normal;
    font-size: 12px;
    letter-spacing: 0.1em;
    color: var(--amber);
  }
  .mmenu__links span {
    margin-left: auto;
    font-family: var(--sans);
    font-size: 9.5px;
    font-weight: 500;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--ink-soft);
  }

  .mmenu__foot {
    border-top: 1px solid var(--line-soft);
    padding-top: 18px;
    display: grid;
    gap: 8px;
  }
  .mmenu__foot a { font-size: 13px; font-weight: 600; }
  .mmenu__foot p { font-size: 11px; color: var(--ink-soft); letter-spacing: 0.06em; }

  body.menu-open { overflow: hidden; }

  /* HERO：标题收紧，图文上下紧贴 */
  .hero { padding-top: 30px; }
  .hero__grid { grid-template-columns: 1fr; gap: 28px; }
  .hero__copy h1 { font-size: clamp(36px, 11vw, 48px); margin-bottom: 16px; }
  .hero__lede { font-size: 14px; margin-bottom: 24px; }
  .hero__cta { gap: 12px; }
  .btn { padding: 12px 22px; font-size: 12px; }
  .hero__media img { aspect-ratio: 4 / 4.1; }
  .hero__media figcaption { font-size: 11.5px; padding-top: 10px; padding-bottom: 10px; }

  /* 旅程：编号在左、内容在右的紧凑列表 */
  .journey { grid-template-columns: 1fr; margin-top: 44px; }
  .journey li {
    display: grid;
    grid-template-columns: 44px 1fr;
    column-gap: 4px;
    align-items: baseline;
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
    padding: 18px 0 20px !important;
  }
  .journey li:last-child { border-bottom: 0; }
  .journey__no { grid-row: 1 / span 3; }
  .journey h3 { font-size: 19px; margin: 0 0 4px; display: inline-block; }
  .journey p { font-size: 13px; max-width: none; }
  .journey em { margin-top: 10px; font-size: 10px; padding: 4px 11px; justify-self: start; width: fit-content; }

  /* 在线验光 */
  .refraction { margin-top: 56px; }
  .refraction__inner { grid-template-columns: 1fr; gap: 40px; padding-top: 52px; padding-bottom: 56px; }
  .refraction h2 { font-size: clamp(30px, 9vw, 40px); margin-bottom: 14px; }
  .section-lede { font-size: 13.5px; }
  .refraction__flow { margin-top: 24px; gap: 8px; }
  .refraction__flow li { font-size: 11px; padding: 6px 12px; }
  .refraction__specs { grid-template-columns: 1fr 1fr; margin: 26px 0 30px; }
  .refraction__specs li { padding: 12px 8px 12px 0; }
  .refraction__specs strong { font-size: 16px; }
  .refraction__specs span { font-size: 11.5px; }
  .refraction__note { font-size: 11px; max-width: none; }
  .phone { transform: rotate(0); width: min(250px, 72vw); border-radius: 38px; padding: 9px; }
  .phone__screen { border-radius: 30px; padding: 24px 18px 18px; }
  .astig-dial { width: 112px; height: 112px; }
  .phone__readout { font-size: 11.5px; }

  /* 视界 */
  .journal { padding-top: 60px; }
  .journal__head { flex-direction: column; align-items: flex-start; gap: 18px; margin-bottom: 30px; }
  .journal__head h2 { font-size: clamp(28px, 8.5vw, 36px); }
  .journal__intro { font-size: 13px; padding-left: 14px; }
  .journal__grid { gap: 36px; }
  .story__body { padding-top: 16px; }
  .story__body h3, .story--feature .story__body h3 { font-size: 19px; }
  .story__body > p { font-size: 13px; }
  .shelf-strip { margin-top: 14px; padding-top: 12px; gap: 8px; }
  .shelf-chip { padding: 6px 12px 6px 6px; gap: 9px; }
  .shelf-chip img { width: 44px; height: 30px; }
  .journal__more { padding-top: 28px; }

  /* AI 试戴：画廊改为横滑 */
  .tryon { margin-top: 64px; }
  .tryon__inner { padding-top: 52px; padding-bottom: 56px; }
  .tryon__head { margin-bottom: 28px; }
  .tryon__head h2 { font-size: clamp(28px, 8.5vw, 38px); margin-bottom: 14px; }
  .tryon__head p { font-size: 13.5px; }
  .tryon__features { grid-template-columns: 1fr 1fr; gap: 14px 18px; margin-bottom: 30px; }
  .tryon__features li { padding-top: 14px; }
  .tryon__features b { font-size: 14px; }
  .tryon__features span { font-size: 11px; line-height: 1.55; }
  .tryon__gallery {
    display: flex;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    gap: 12px;
    margin: 0 calc(-1 * var(--pad));
    padding: 0 var(--pad);
  }
  .tryon__gallery::-webkit-scrollbar { display: none; }
  .tryon__gallery figure { flex: 0 0 74%; scroll-snap-align: center; }
  .tryon__gallery figure:nth-child(2) { transform: none; }
  .tryon__gallery figcaption { font-size: 10.5px; padding-top: 8px; }
  .tryon__cta { margin-top: 32px; gap: 16px; }

  /* 货架 */
  .shelf { padding-top: 60px; }
  .shelf__head { flex-direction: column; align-items: flex-start; gap: 16px; margin-bottom: 26px; }
  .shelf__head h2 { font-size: clamp(26px, 8vw, 34px); }
  .shelf__grid { grid-template-columns: 1fr 1fr; gap: 14px 12px; }
  .product__meta { padding-top: 12px; }
  .product__meta h3 { font-size: 14.5px; }
  .product__meta p { font-size: 11px; }
  .product__meta b { font-size: 13px; margin-top: 4px; }
  .product__try { font-size: 10px; padding: 7px 16px; bottom: 10px; }

  /* 生态 */
  .universe { padding-top: 60px; }
  .universe__head { margin-bottom: 26px; }
  .universe__head h2 { font-size: clamp(26px, 8vw, 34px); }
  .universe__grid { grid-template-columns: 1fr; }
  .ucard { padding: 20px 18px 22px; gap: 8px; }
  .ucard__platform { margin-bottom: 4px; font-size: 9px; }
  .ucard h3 { font-size: 19px; }
  .ucard p { font-size: 12.5px; }

  /* 宣言与页脚 */
  .manifesto { padding: 64px var(--pad); }
  .manifesto p { font-size: clamp(24px, 7.5vw, 32px); }
  .manifesto cite { margin-top: 18px; font-size: 10.5px; }
  .footer { padding-top: 40px; }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 28px 20px; padding-bottom: 32px; }
  .footer__brand {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 30px;
  }
  .footer__logo { flex: 0 0 auto; margin-bottom: 0; }
  .footer__logo img { height: 50px; }
  .footer__brand p:last-child { margin: 0; }
  .footer nav a { font-size: 13px; padding: 3px 0; }
  .footer__pay { grid-column: 1 / -1; }
  .footer__legal { font-size: 10.5px; padding-top: 16px; }
}