:root {
  --ink: #0f1c1a;
  --forest: #1b3a34;
  --moss: #2f6b5d;
  --mist: #d7ebe4;
  --sand: #f3efe6;
  --coral: #e36a4a;
  --coral-deep: #c24f31;
  --paper: #f7f4ee;
  --line: rgba(15, 28, 26, 0.12);
  --shadow: 0 24px 60px rgba(15, 28, 26, 0.18);
  --radius: 18px;
  --font-display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --font-body: "Manrope", "PingFang TC", "Noto Sans TC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(47, 107, 93, 0.28), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(227, 106, 74, 0.18), transparent 55%),
    linear-gradient(180deg, #eef6f2 0%, var(--paper) 42%, #ebe4d8 100%);
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 6vw;
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(247, 244, 238, 0.72);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, background .3s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--line); }

.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.55rem;
  letter-spacing: 0.04em;
}
.brand span { color: var(--coral); }

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem 1.1rem;
  align-items: center;
  font-size: .95rem;
}
.nav a { opacity: .82; }
.nav a:hover { opacity: 1; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  border: 0;
  cursor: pointer;
  border-radius: 999px;
  padding: .78rem 1.25rem;
  font: inherit;
  font-weight: 650;
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--ink);
  color: #fff;
  box-shadow: 0 10px 28px rgba(15, 28, 26, 0.22);
}
.btn-primary:hover { background: var(--forest); }
.btn-accent {
  background: var(--coral);
  color: #fff;
}
.btn-accent:hover { background: var(--coral-deep); }
.btn-ghost {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
}
.btn-soft {
  background: rgba(47, 107, 93, 0.12);
  color: var(--forest);
}

.hero {
  min-height: calc(100vh - 74px);
  display: grid;
  align-items: end;
  padding: 8vh 6vw 10vh;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(15, 28, 26, 0.78), rgba(27, 58, 52, 0.35) 48%, rgba(227, 106, 74, 0.22)),
    url("data:image/svg+xml,%3Csvg width='160' height='160' viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' stroke='%23ffffff' stroke-opacity='0.06'%3E%3Cpath d='M0 80h160M80 0v160'/%3E%3C/g%3E%3C/svg%3E"),
    radial-gradient(circle at 70% 40%, #2f6b5d, #0f1c1a 70%);
  background-size: cover, 80px 80px, cover;
  z-index: 0;
  animation: heroShift 18s ease-in-out infinite alternate;
}
.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 760px;
  color: #f7f4ee;
  animation: riseIn .9s ease both;
}
.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(3.4rem, 10vw, 7rem);
  line-height: .92;
  margin: 0 0 .6rem;
  letter-spacing: -0.03em;
}
.hero-brand em {
  font-style: normal;
  color: #ffb29a;
}
.hero p {
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  max-width: 34rem;
  opacity: .92;
  margin: 0 0 1.6rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; }
.hero-actions .btn-primary { background: #fff; color: var(--ink); }
.hero-actions .btn-ghost { border-color: rgba(255,255,255,.35); color: #fff; }

.section {
  padding: 4.5rem 6vw;
}
.section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 0 0 .5rem;
}
.section .lead {
  margin: 0 0 1.8rem;
  max-width: 38rem;
  color: rgba(15,28,26,.72);
}

.panel {
  background: rgba(255,255,255,.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  backdrop-filter: blur(8px);
}
.grid {
  display: grid;
  gap: 1rem;
}
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.profile-row {
  display: grid;
  gap: .85rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
  animation: riseIn .5s ease both;
}
.profile-row:last-child { border-bottom: 0; }
.profile-row h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
}
.meta {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-top: .45rem;
}
.chip {
  display: inline-flex;
  padding: .2rem .55rem;
  border-radius: 999px;
  background: rgba(47,107,93,.12);
  color: var(--forest);
  font-size: .78rem;
  font-weight: 600;
}

label {
  display: block;
  font-size: .88rem;
  font-weight: 650;
  margin-bottom: .35rem;
}
input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.85);
  border-radius: 12px;
  padding: .75rem .9rem;
  font: inherit;
  margin-bottom: .95rem;
}
textarea { min-height: 120px; resize: vertical; }

.flash {
  margin: 1rem 6vw 0;
  padding: .85rem 1rem;
  border-radius: 12px;
  background: rgba(47,107,93,.14);
  color: var(--forest);
  animation: riseIn .35s ease both;
}
.flash.error { background: rgba(227,106,74,.16); color: var(--coral-deep); }

.msg-list { display: grid; gap: .75rem; }
.msg {
  max-width: 72%;
  padding: .8rem 1rem;
  border-radius: 16px;
  background: rgba(255,255,255,.8);
  border: 1px solid var(--line);
}
.msg.mine {
  margin-left: auto;
  background: rgba(47,107,93,.14);
}

.site-footer {
  padding: 2rem 6vw 3rem;
  opacity: .65;
  font-size: .9rem;
}

@keyframes riseIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes heroShift {
  from { filter: saturate(1); transform: scale(1); }
  to { filter: saturate(1.08); transform: scale(1.04); }
}

@media (max-width: 860px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .site-header { padding: 1rem 1.25rem; }
  .section, .hero { padding-left: 1.25rem; padding-right: 1.25rem; }
  .flash { margin-left: 1.25rem; margin-right: 1.25rem; }
  .msg { max-width: 92%; }
}