/* =========================================================
   小禾山野 · website2
   山野有时，身体有应
   ========================================================= */

:root {
  --paper: #F4F1E9;
  --paper-2: #FAF8F1;
  --ink: #22201C;
  --ink-2: #5F5B53;
  --ink-3: #8F897E;
  --line: rgba(34, 32, 28, .14);
  --line-soft: rgba(34, 32, 28, .08);
  --moss: #3E5145;
  --pad: clamp(24px, 7vw, 118px);
  --maxw: 1180px;
  --nav-h: 68px;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", "SimSun", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 10px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
::selection { background: rgba(62, 81, 69, .16); }

/* 纸张颗粒 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 90;
  pointer-events: none;
  opacity: .028;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='150' height='150'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* =========================================================
   导航
   ========================================================= */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--pad);
  transition: background .5s var(--ease), border-color .5s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(244, 241, 233, .88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--line-soft);
}

.brand { display: flex; align-items: baseline; gap: 10px; text-decoration: none; color: inherit; }
.brand__logo { width: 26px; height: 26px; border-radius: 50%; align-self: center; opacity: .92; }
.brand__name { font-family: var(--serif); font-size: 15px; letter-spacing: .2em; color: var(--ink); }
.brand__en { font-size: 8px; letter-spacing: .3em; color: var(--ink-3); }

.nav__links { display: flex; gap: clamp(20px, 3vw, 44px); }
.nav__links a {
  position: relative;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--ink-3);
  text-decoration: none;
  padding: 4px 0;
  transition: color .35s;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: rgba(34, 32, 28, .5);
  transition: width .4s var(--ease);
}
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { width: 100%; }

/* =========================================================
   首屏
   ========================================================= */
.hero {
  position: relative;
  min-height: 100svh;
  padding: calc(var(--nav-h) + 40px) var(--pad) 120px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__mark {
  position: absolute;
  top: 52%;
  right: 6vw;
  transform: translateY(-50%);
  font-family: var(--serif);
  font-size: clamp(260px, 46vh, 560px);
  line-height: 1;
  color: rgba(34, 32, 28, .045);
  user-select: none;
  pointer-events: none;
}

.hero__side {
  position: absolute;
  top: 50%;
  right: calc(var(--pad) * .38);
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-size: 8.5px;
  letter-spacing: .48em;
  color: var(--ink-3);
  opacity: .85;
}

.hero__inner { position: relative; z-index: 2; max-width: 780px; }

.hero__eyebrow {
  font-size: 10.5px;
  letter-spacing: .42em;
  color: var(--ink-3);
  margin-bottom: clamp(36px, 5vw, 64px);
}
.hero__title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(44px, 7vw, 92px);
  line-height: 1.5;
  letter-spacing: .06em;
  margin: 0;
  color: var(--ink);
}
.hero__sub {
  margin-top: clamp(26px, 3.6vw, 46px);
  font-size: clamp(13.5px, 1.1vw, 15px);
  line-height: 2.5;
  letter-spacing: .12em;
  color: var(--ink-2);
}
.hero__sub2 {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 2.2;
  letter-spacing: .12em;
  color: var(--ink-3);
}

.hero__scroll {
  position: absolute;
  left: var(--pad);
  bottom: 44px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  font-size: 10px;
  letter-spacing: .3em;
  color: var(--ink-3);
  text-decoration: none;
  transition: color .35s;
}
.hero__scroll:hover { color: var(--ink-2); }
.hero__scroll i {
  display: block;
  width: 1px;
  height: 52px;
  margin-left: 3px;
  background: rgba(34, 32, 28, .28);
  transform-origin: top;
  animation: drop 3s ease-in-out infinite;
}
@keyframes drop {
  0%, 100% { transform: scaleY(.4); opacity: .5; }
  50% { transform: scaleY(1); opacity: 1; }
}

/* =========================================================
   通用
   ========================================================= */
.section { padding: clamp(88px, 11vw, 168px) var(--pad); }
.wrap { max-width: var(--maxw); margin: 0 auto; }

.sec-head {
  max-width: 760px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  margin-bottom: clamp(46px, 6vw, 78px);
}
.label {
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-size: 9.5px;
  letter-spacing: .34em;
  color: var(--ink-3);
}
.label span {
  font-family: var(--serif);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--moss);
}
.sec-title {
  margin: 26px 0 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(26px, 3.1vw, 40px);
  line-height: 1.72;
  letter-spacing: .07em;
  color: var(--ink);
}
.sec-note {
  margin-top: 20px;
  font-size: 12.5px;
  line-height: 2;
  letter-spacing: .1em;
  color: var(--ink-3);
}

.para {
  font-size: 14px;
  line-height: 2.3;
  letter-spacing: .04em;
  color: var(--ink-2);
  text-align: justify;
}
.para + .para { margin-top: 18px; }

/* =========================================================
   01 骨相
   ========================================================= */
.tree-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 336px;
  gap: clamp(32px, 6vw, 84px);
  align-items: start;
}

.tree {
  position: relative;
  width: 100%;
  aspect-ratio: 680 / 780;
}
.tree__svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}
.tree__svg path {
  stroke: rgba(34, 32, 28, .38);
  stroke-width: .9;
  stroke-linecap: round;
  fill: none;
}
.tree__svg .stem path { stroke-width: 1.05; stroke: rgba(34, 32, 28, .5); }
.tree__svg .leaves path { stroke-width: .7; opacity: .55; }
.tree__svg circle {
  fill: var(--paper);
  stroke: rgba(34, 32, 28, .5);
  stroke-width: 1;
  transition: fill .4s var(--ease), r .4s var(--ease);
}
.tree__svg circle.is-active { fill: var(--ink); stroke: var(--ink); }
.tree__svg .dot--tip { fill: rgba(34, 32, 28, .35); stroke: none; }

.node {
  position: absolute;
  top: var(--y);
  left: var(--x);
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 6px 0;
  border: 0;
  background: none;
  font: inherit;
  color: var(--ink-3);
  cursor: pointer;
  text-align: left;
  transition: color .4s;
}
.node--r { transform: translate(18px, -50%); }
.node--l { transform: translate(calc(-100% - 18px), -50%); text-align: right; align-items: flex-end; }

.node__cn {
  position: relative;
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: .26em;
  color: var(--ink-2);
  transition: color .4s;
}
.node__cn::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 1px;
  background: rgba(34, 32, 28, .45);
  transition: width .45s var(--ease);
}
.node__en {
  font-size: 8px;
  letter-spacing: .38em;
  color: var(--ink-3);
  transition: color .4s;
}
.node:hover .node__cn, .node.is-active .node__cn { color: var(--ink); }
.node:hover .node__cn::after, .node.is-active .node__cn::after { width: 100%; }
.node.is-active .node__en { color: var(--moss); }
.node:focus-visible { outline: none; }
.node:focus-visible .node__cn { color: var(--ink); }

.panel {
  position: sticky;
  top: calc(var(--nav-h) + 40px);
  padding-top: 24px;
  border-top: 1px solid var(--line);
  transition: opacity .3s var(--ease), transform .3s var(--ease);
}
.panel.is-fading { opacity: 0; transform: translateY(8px); }
.panel__no {
  font-family: var(--serif);
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--moss);
}
.panel__title {
  margin: 16px 0 8px;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 30px;
  letter-spacing: .2em;
  color: var(--ink);
}
.panel__en { font-size: 8.5px; letter-spacing: .34em; color: var(--ink-3); }
.panel__lead {
  margin-top: clamp(22px, 2.6vw, 32px);
  font-family: var(--serif);
  font-size: 16.5px;
  line-height: 2;
  letter-spacing: .08em;
  color: var(--ink);
}
.panel__desc {
  margin-top: 14px;
  font-size: 13px;
  line-height: 2.1;
  letter-spacing: .03em;
  color: var(--ink-2);
}
.panel__list {
  margin-top: 26px;
  border-top: 1px solid var(--line);
}
.panel__list li {
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--ink-3);
}

/* 移动端手风琴 */
.tree-m { display: none; }
.tree-m .m-item {
  border-top: 1px solid var(--line);
}
.tree-m .m-item:last-child { border-bottom: 1px solid var(--line); }
.m-item summary {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 22px 0;
  cursor: pointer;
  list-style: none;
}
.m-item summary::-webkit-details-marker { display: none; }
.m-item summary::after {
  content: "+";
  margin-left: auto;
  font-size: 15px;
  color: var(--ink-3);
  transition: transform .3s;
}
.m-item[open] summary::after { content: "−"; }
.m-item__cn { font-family: var(--serif); font-size: 19px; letter-spacing: .22em; color: var(--ink); }
.m-item__en { font-size: 8px; letter-spacing: .34em; color: var(--ink-3); }
.m-item__lead {
  font-family: var(--serif);
  font-size: 15px;
  line-height: 2;
  letter-spacing: .06em;
  color: var(--ink);
  padding-bottom: 14px;
}
.m-item__desc { font-size: 13px; line-height: 2.1; color: var(--ink-2); }
.m-item__list { margin: 18px 0 24px; }
.m-item__list li {
  padding: 9px 0;
  border-top: 1px solid var(--line-soft);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--ink-3);
}

/* =========================================================
   02 本草
   ========================================================= */
.section.bencao { padding: clamp(88px, 11vw, 168px) 0 clamp(48px, 6vw, 72px); }
.section.about { padding-bottom: clamp(56px, 7vw, 92px); }
.bencao .wrap { padding: 0 var(--pad); }

.bencao__spread {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  gap: clamp(16px, 2.6vw, 40px);
  margin-top: clamp(36px, 4.6vw, 58px);
  padding-left: var(--pad);
  align-items: stretch;
}

.plate {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(18px, 2.8vw, 38px) clamp(14px, 2.2vw, 30px);
  align-content: start;
  padding: clamp(26px, 3.2vw, 48px);
  background: var(--paper-2);
  border: 1px solid var(--line);
}
.plate__cap {
  grid-column: 1 / -1;
  margin-bottom: 8px;
  font-size: 9.5px;
  letter-spacing: .32em;
  color: var(--ink-3);
}
.specimen { transform: rotate(var(--r, 0deg)); }
.specimen:nth-child(even) { margin-top: clamp(10px, 1.6vw, 26px); }
.specimen svg {
  width: clamp(58px, 5.4vw, 76px);
  height: clamp(58px, 5.4vw, 76px);
  fill: none;
  stroke: rgba(34, 32, 28, .48);
  stroke-width: 1;
  stroke-linecap: round;
  stroke-linejoin: round;
  margin-bottom: 14px;
}
.specimen__name {
  font-family: var(--serif);
  font-size: 14.5px;
  letter-spacing: .08em;
  color: var(--ink);
}
.specimen__latin {
  margin-top: 3px;
  font-size: 9px;
  letter-spacing: .04em;
  font-style: italic;
  color: var(--ink-3);
}
.specimen__note {
  margin-top: 9px;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--ink-2);
}

.bencao__photo {
  position: relative;
  overflow: hidden;
  min-height: clamp(420px, 46vw, 640px);
  background: #2c332c;
}
.bencao__photo img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.78) brightness(.78);
}
.bencao__photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(22, 30, 24, .28), rgba(22, 30, 24, .52));
}
.bencao__vtext {
  position: absolute;
  z-index: 2;
  top: 34px;
  right: 26px;
  writing-mode: vertical-rl;
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: .34em;
  color: rgba(255, 255, 255, .88);
}

.bencao__body {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 48px;
  margin-top: clamp(38px, 4.6vw, 64px);
}
.bencao__text { max-width: 560px; }
.bencao__sign {
  flex: none;
  font-family: var(--serif);
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--ink-3);
}

/* =========================================================
   03 时令
   ========================================================= */
.seasons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}
.season {
  padding: 34px clamp(16px, 2.4vw, 32px) 10px 0;
  border-right: 1px solid var(--line);
}
.season:last-child { border-right: 0; padding-right: 0; }
.season__cn {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 32px;
  letter-spacing: .12em;
  color: var(--ink);
}
.season__en {
  margin-top: 8px;
  font-size: 8.5px;
  letter-spacing: .42em;
  color: var(--ink-3);
}
.season__list { margin-top: 28px; }
.season__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 12px;
  padding: 14px 0;
  border-top: 1px solid var(--line-soft);
}
.season__term { font-size: 10.5px; letter-spacing: .14em; color: var(--ink-3); }
.season__item { font-family: var(--serif); font-size: 14px; letter-spacing: .08em; color: var(--ink); }
.season__list em {
  grid-column: 1 / -1;
  font-style: normal;
  font-size: 10.5px;
  letter-spacing: .06em;
  color: var(--ink-3);
}

/* =========================================================
   04 关于
   ========================================================= */
.about__head {
  padding-top: 26px;
  border-top: 1px solid var(--line);
  margin-bottom: clamp(34px, 4.4vw, 58px);
}
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 6vw, 96px);
  align-items: start;
}
.about__grid .sec-title { margin-top: 0; }
.about__sign {
  margin-top: 40px;
  font-family: var(--serif);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--ink-3);
}

.mini {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  margin-top: clamp(72px, 9vw, 120px);
  padding-top: 34px;
  border-top: 1px solid var(--line);
}
.mini__title {
  margin-top: 16px;
  font-family: var(--serif);
  font-size: clamp(18px, 2vw, 22px);
  letter-spacing: .12em;
  color: var(--ink);
}
.mini__qr { display: flex; align-items: center; gap: 18px; }
.mini__qr img { width: 132px; height: 132px; }
.mini__qr p { font-size: 10.5px; letter-spacing: .18em; color: var(--ink-3); }

/* =========================================================
   页脚
   ========================================================= */
.footer {
  padding: 46px var(--pad) 40px;
  border-top: 1px solid var(--line);
}
.footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 28px;
}
.footer__brand { display: flex; align-items: baseline; gap: 12px; }
.footer__name { font-family: var(--serif); font-size: 14px; letter-spacing: .2em; color: var(--ink); }
.footer__en { font-size: 8px; letter-spacing: .32em; color: var(--ink-3); }
.footer__line {
  margin-top: 14px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink-3);
}
.footer__meta { text-align: right; font-size: 10.5px; line-height: 2.1; letter-spacing: .06em; color: var(--ink-3); }
.footer__meta .icp { color: var(--ink-3); text-decoration: none; transition: color .3s; }
.footer__meta .icp:hover { color: var(--ink-2); }
.footer__copy { margin-top: 4px; }

/* =========================================================
   动效
   ========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 1.05s var(--ease), transform 1.05s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1024px) {
  .tree-wrap { grid-template-columns: minmax(0, 1fr) 300px; gap: 32px; }
  .node__cn { font-size: 18px; }
}

@media (max-width: 900px) {
  .nav { height: 60px; }
  .nav__links { gap: 20px; }
  .nav__links a { font-size: 11.5px; }

  .hero { padding-top: calc(var(--nav-h) + 32px); padding-bottom: 110px; }
  .hero__mark {
    top: auto;
    bottom: -7%;
    right: -14%;
    font-size: 60vw;
    opacity: .5;
  }
  .hero__side { display: none; }
  .hero__title { font-size: clamp(40px, 9.4vw, 60px); line-height: 1.55; }

  .tree-wrap { display: none; }
  .tree-m { display: block; }

  .bencao__spread { grid-template-columns: 1fr; padding-right: var(--pad); }
  .bencao__photo { order: -1; min-height: 300px; }
  .bencao__body { flex-direction: column; align-items: flex-start; gap: 24px; }

  .seasons { grid-template-columns: 1fr 1fr; }
  .season { padding-right: 20px; }
  .season:nth-child(2) { border-right: 0; }
  .season:nth-child(n+3) { border-top: 1px solid var(--line); }
  .season:nth-child(3) { padding-top: 30px; }
  .season:nth-child(4) { padding-top: 30px; }

  .about__grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 620px) {
  .nav__links { display: none; }
  .plate { grid-template-columns: 1fr 1fr; padding: 26px 22px; }
  .specimen svg { width: 40px; height: 40px; }
  .mini { flex-direction: column; align-items: flex-start; gap: 26px; }
  .footer__inner { flex-direction: column; align-items: flex-start; }
  .footer__meta { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}