:root{
  --ink:#17343f;
  --muted:#617983;
  --line:#d7e7ed;
  --water:#57b9d8;
  --water-deep:#167a9d;
  --water-pale:#eef9fc;
  --sand:#f7f3ed;
  --white:#fff;
  --shadow:0 18px 44px rgba(20,59,73,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--ink);
  background:#fff;
  font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic","YuGothic",Meiryo,sans-serif;
  line-height:1.86;
  letter-spacing:.015em;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
.nowrap{white-space:nowrap}
.site-header{
  position:sticky;top:0;z-index:30;
  border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);
}
.header-inner{
  max-width:1120px;margin:auto;padding:12px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.water-brand{display:flex;flex-direction:column;text-decoration:none;line-height:1.18}
.water-brand-main{font-size:20px;font-weight:700;letter-spacing:.05em;color:#126d8e}
.water-brand-sub{margin-top:4px;font-size:10px;color:#7a929c;letter-spacing:.08em}
.header-note{margin:0;color:var(--muted);font-size:13px}

.hero{background:#102d38}
.hero-photo{min-height:690px;position:relative;overflow:hidden}
.hero-photo>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 52%}
.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(6,29,38,.86) 0%,rgba(8,33,43,.76) 42%,rgba(8,33,43,.22) 72%,rgba(8,33,43,.05) 100%)}
.hero-copy{
  position:relative;z-index:2;
  width:min(1120px,calc(100% - 48px));margin:auto;padding:78px 0 70px;
  color:#fff;max-width:1120px;
}
.hero-copy>*{max-width:650px}
.pr-label{
  display:inline-block!important;width:auto;
  margin:0 0 28px;padding:7px 11px;border:1px solid rgba(255,255,255,.45);
  border-radius:999px;background:rgba(255,255,255,.10);font-size:12px;line-height:1.5
}
.eyebrow,.section-kicker{margin:0 0 10px;color:var(--water-deep);font-size:13px;font-weight:700;letter-spacing:.12em}
.eyebrow.light{color:#b7eafa}
h1,h2,h3{line-height:1.42;letter-spacing:.005em}
h1{margin:0 0 26px;font-size:clamp(44px,5.6vw,72px);font-weight:700;letter-spacing:-.025em}
h2{margin:0 0 22px;font-size:clamp(28px,3.1vw,42px);font-weight:700}
h3{margin:0 0 12px;font-size:20px;font-weight:700}
p{margin:0 0 1.25em}
.hero-lead{font-size:18px;line-height:1.9;color:#f2f8fa}
.jump-link{
  display:inline-flex;align-items:center;justify-content:center;min-height:54px;
  margin-top:12px;padding:0 25px;border-radius:999px;text-decoration:none;
  background:var(--water-deep);color:#fff;font-weight:700;box-shadow:0 12px 24px rgba(0,0,0,.14)
}
.hero-cta{background:#fff;color:#135f7a;box-shadow:0 12px 30px rgba(0,0,0,.24)}

.benefit-strip{background:#fff;border-bottom:1px solid var(--line)}
.benefit-grid{display:grid;grid-template-columns:repeat(4,1fr);max-width:1120px;margin:auto}
.benefit-grid>div{padding:24px;border-right:1px solid var(--line)}
.benefit-grid>div:last-child{border-right:0}
.benefit-grid span{display:block;margin-bottom:5px;color:#3e9dba;font-size:11px;font-weight:700}
.benefit-grid p{margin:0;font-size:14px;font-weight:700;line-height:1.55}

.section{padding:86px 24px}
.inner{max-width:1080px;margin:auto}
.narrow{max-width:800px}
.stat-section{background:#fff}
.stat-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.stat-copy p{font-size:16px}
.source-note,.fine-print,.photo-credit,.compare-note{font-size:12px!important;color:#73858c}
.number-visual{
  padding:36px;border-radius:28px;background:linear-gradient(145deg,#edf9fc,#fff);
  border:1px solid #cfe8ef;text-align:center;box-shadow:var(--shadow)
}
.big-number{font-size:76px;font-weight:800;line-height:1;color:#137da0}
.big-number span{font-size:30px;margin-left:6px}
.number-label{margin-top:12px;font-size:14px;color:#58717b}
.number-arrow{margin:25px 0 13px;color:#6a8b96;font-size:14px}
.month-number{font-size:48px;font-weight:800;color:#173f4f}
.month-number span{font-size:20px;margin-left:6px}
.number-caption{font-size:12px;color:#7b8e96}

.saving-section{background:#f4fbfd;border-top:1px solid #dbeef3;border-bottom:1px solid #dbeef3}
.saving-intro{max-width:760px}
.cost-compare{margin-top:38px;display:grid;grid-template-columns:1fr 58px 1fr;align-items:stretch;gap:18px}
.cost-card{padding:31px;border-radius:24px;background:#fff;border:1px solid #d4e7ed;box-shadow:0 14px 30px rgba(24,72,90,.07)}
.server-card{border:2px solid #86c8dc}
.cost-label{margin-bottom:16px;font-size:14px;font-weight:700;color:#47656f}
.cost-visual{height:92px;display:flex;align-items:center;gap:18px}
.cost-formula{font-size:14px;color:#627983}
.bottle-icon{
  width:42px;height:76px;border:2px solid #87b9ca;border-radius:9px 9px 12px 12px;
  background:linear-gradient(#eaf8fc,#bde5f1);position:relative;flex:0 0 auto
}
.bottle-icon:before{content:"";position:absolute;width:20px;height:12px;left:9px;top:-10px;border-radius:4px;background:#4f9fbb}
.server-icon{
  width:48px;height:88px;border:1px solid #a6bdc5;border-radius:9px;background:linear-gradient(#f4f6f7,#dbe5e8);position:relative;flex:0 0 auto
}
.server-icon:before{content:"";position:absolute;left:9px;right:9px;top:12px;height:20px;border-radius:5px;background:#87c8dd}
.server-icon:after{content:"";position:absolute;left:21px;top:43px;width:8px;height:20px;border-radius:3px;background:#769aa7}
.cost-price{margin:8px 0 18px;font-size:42px;font-weight:800;line-height:1.1;color:#183f4f}
.cost-price span{font-size:15px;font-weight:600;color:#607983}
.cost-card ul{margin:0;padding-left:1.2em;color:#506872;font-size:14px}
.cost-card li{margin:.45em 0}
.vs-mark{align-self:center;justify-self:center;width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#1a809f;color:#fff;font-size:12px;font-weight:800}
.saving-result{margin:28px auto 16px;max-width:560px;padding:26px 24px;border-radius:22px;background:#163f4e;color:#fff;text-align:center}
.saving-result-title{margin-bottom:4px;font-size:13px;color:#b7deea}
.saving-result-number{margin:0;font-size:46px;font-weight:800;line-height:1.25}
.saving-result-sub{margin:6px 0 0;font-size:15px}
.fine-print{max-width:880px;margin:18px auto 0;line-height:1.7}

.lifestyle-section{background:#fff}
.photo-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:20px;margin-top:36px}
.photo-card,.benefit-card{border-radius:22px;overflow:hidden;border:1px solid #dce8ec;background:#fff}
.photo-card img{width:100%;height:275px;object-fit:cover}
.photo-card.large img{height:330px}
.photo-card figcaption{padding:19px 21px;color:#4e6771;font-size:14px;line-height:1.65}
.photo-card figcaption span{display:block;margin-bottom:3px;color:#174d61;font-size:18px;font-weight:700}
.benefit-card{padding:28px;background:#f6fbfc}
.benefit-icon{margin:0 0 12px;font-size:43px;font-weight:800;color:#3ca3c0;line-height:1}
.benefit-card p:last-child{margin-bottom:0;color:#526a74;font-size:14px}
.photo-credit{margin-top:12px}

.product-section{background:linear-gradient(180deg,#eef9fc,#f8fdfe);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.product-wrap{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr);gap:48px;align-items:start}
.product-points{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:30px 0}
.product-points>div{padding:18px;border-radius:17px;background:#fff;border:1px solid #d9e8ed}
.product-points span{display:block;margin-bottom:5px;color:#167a9d;font-size:12px;font-weight:800}
.product-points p{margin:0;font-size:14px;font-weight:600}
.caution-box{margin-top:28px;padding:22px 24px;border-radius:17px;background:#fff8ed;border:1px solid #ead9bb}
.caution-box h3{font-size:17px}
.caution-box p{margin-bottom:0;font-size:13px;color:#675a45}
.official-box{padding:28px;border-radius:24px;background:#fff;box-shadow:var(--shadow);border:1px solid #d9e8ed}
.official-label{margin-bottom:10px;color:var(--water-deep);font-size:15px;font-weight:800}
.official-box>p{font-size:13px;color:#53646c}
.affiliate-banner{margin:22px auto 8px;text-align:center}
.affiliate-banner a{display:inline-block;line-height:0}
.affiliate-banner img[width="300"]{width:300px;max-width:100%;height:auto}
.ad-note{margin:8px 0 0!important;font-size:11px!important;text-align:center;color:#7a878d!important}

.compare-section{background:#fff}
.simple-table-wrap{overflow:auto;margin-top:32px;border:1px solid #dce7eb;border-radius:18px}
.simple-table{width:100%;border-collapse:collapse;min-width:700px;background:#fff}
.simple-table th,.simple-table td{padding:18px 20px;border-bottom:1px solid #e2ebee;text-align:left;font-size:14px}
.simple-table th{background:#f4f9fa;color:#49636d;font-size:12px}
.simple-table tr:last-child td{border-bottom:0}
.highlight-row td{background:#edf9fc;font-weight:600}
.compare-note{max-width:850px;margin:20px 0 0;line-height:1.8}

.final-cta{background:#173f4f;color:#fff;text-align:center}
.final-cta .section-kicker{color:#9fd8e9}
.final-cta p{color:#e5eff2}
.final-cta .jump-link{background:#fff;color:#175d76}

.disclosure{padding-top:54px;padding-bottom:58px;background:#f8f8f8;border-top:1px solid #e5e5e5}
.disclosure h2{font-size:22px}
.disclosure p{font-size:12px;color:#66777e}

.site-footer{background:#102e39;color:#e9f1f4}
.footer-inner{max-width:1080px;margin:auto;padding:38px 24px 44px}
.footer-water-brand{display:inline-flex;margin-bottom:20px}
.footer-water-brand .water-brand-main{color:#fff}
.footer-water-brand .water-brand-sub{color:#9db8c2}
.site-footer nav{display:flex;flex-wrap:wrap;gap:8px 20px;margin-bottom:20px}
.site-footer nav a{color:#d8e4e8;font-size:13px;text-decoration:none}
.site-footer p{margin:0;color:#aebdc3;font-size:12px}

@media (max-width:900px){
  .hero-photo{min-height:640px}
  .hero-shade{background:linear-gradient(90deg,rgba(6,29,38,.82),rgba(6,29,38,.56))}
  .benefit-grid{grid-template-columns:1fr 1fr}
  .benefit-grid>div:nth-child(2){border-right:0}
  .benefit-grid>div:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .stat-layout,.product-wrap{grid-template-columns:1fr}
  .cost-compare{grid-template-columns:1fr}
  .vs-mark{margin:-4px 0}
}
@media (max-width:700px){
  .header-inner{padding:11px 18px}.header-note{display:none}.water-brand-main{font-size:18px}
  .hero-photo{min-height:690px}
  .hero-photo>img{object-position:60% center}
  .hero-shade{background:linear-gradient(180deg,rgba(4,25,33,.42) 0%,rgba(4,25,33,.75) 48%,rgba(4,25,33,.90) 100%)}
  .hero-copy{width:calc(100% - 40px);padding:285px 0 48px}
  h1{font-size:42px}.hero-lead{font-size:16px}
  .section{padding:62px 20px}
  .benefit-grid>div{padding:19px 20px}
  .big-number{font-size:64px}.month-number{font-size:41px}
  .photo-grid{grid-template-columns:1fr}.photo-card.large img,.photo-card img{height:240px}
  .product-points{grid-template-columns:1fr 1fr}
  .cost-price{font-size:34px}
  .saving-result-number{font-size:38px}
  .jump-link{width:100%}
}
@media (max-width:430px){
  .benefit-grid{grid-template-columns:1fr}
  .benefit-grid>div{border-right:0!important;border-bottom:1px solid var(--line)!important}
  .benefit-grid>div:last-child{border-bottom:0!important}
  .product-points{grid-template-columns:1fr}
  h1{font-size:38px}
  h2{font-size:29px}
}


/* 2026-09-16 copy / mobile heading refinements */
.hero-copy>*{max-width:760px}
.hero-line{display:block;white-space:normal;overflow-wrap:anywhere}
.pr-inline{
  display:inline-block;
  margin:0 0 10px;
  padding:4px 9px;
  border-radius:999px;
  background:#eef7fa;
  color:#176f91;
  font-size:11px;
  font-weight:800;
  letter-spacing:.08em;
}
.photo-card.large img{object-position:center 45%}
@media (max-width:700px){
  h1{font-size:30px;line-height:1.5;letter-spacing:-.02em}
}
@media (max-width:430px){
  h1{font-size:26px;line-height:1.55}
  .hero-copy{width:calc(100% - 32px)}
}